Because they've been fooled into thinking it will either benefit them, or benefit people they feel "deserve it."

https://www.cracked.com/blog/6-reasons-trumps-rise-that-no-one-talks-about

its not about red vs blue states. It's About The Country Vs. The City

A successful propaganda campaign by the owning class.

And a quote from an anonymous mutual:

many people will unfortunately need to learn this the hard way it seems at the expense of those who take the time to see the writing on the wall those ignorant to their exploitation will seldom listen to those who try to tell them how horribly theyre being fucked "if it were really so bad id notice" theyll say "this isnt so bad" theyll say, standing on the peak of the mountain that is dunning-kruger unknowing all we can do is wait, and watch to find out what what it is that throws them into the valley of unfathomable uncertainty in the meantime we must work for each other, for those who do see how good things could be. maybe then, our greener grass will coax them into giving us a fair listen

The majority of people vote with their gut and won't look deep into what politician A is promising, so long as one of the promises is exactly the thing the person wants. For a considerable number of gamers, it's dealing with woke culture. Trump is a fervent enemy of "the woke", but he also promised hefty import tariffs on everything, so consoles can get really damn expensive. But hey, the woke sjw's are getting owned!!

This piece on Aftermath touches an important point as well, that left leaning content often takes care to not spout random bullshit, while right leaning will just say whatever because haha engagement goes brrrrrrr.

Going off a tangent, the Brazilian right complains that "the poor vote with their bellies", implying they'll vote for whoever promises "free money" or "free meals", usually in the form of govt programs. During election years, the right will try to claim they were the masterminds behind every sort of program meant to help poor people, such as Bolsa Familia, while loudly and constantly complaining about their existence and doing everything in their power to block money outside election years. It's common to find people who depend(ed) on Bolsa Familia to survive that complain about "freeloaders" that "want to be fed by the government". A good portion of right-wingers also believe that the govt pays a whole minimum wage to every person in jail, despite this bullshit being debunked several times already.

One's "own best interest" can take a lot of different forms. Especially when the number and variety of plausible candidates are finite. Your preferred candidate for a given office will rarely line up perfectly with your own values. There's a compromise there.

If I vote for my own finances, it may come at the cost of my morals. It I vote for my own moral interest, it may cost me more. If I vote for my own power, it may cost someone else their freedoms. How heavily do I weight my own interests against those of a wider society? Political identities and philosophies are complicated, and can't necessarily be reduced to a single binary choice that is "best" in every scenario.

Who is there to vote for otherwise? Two sides of the same coin. The rich try to keep politics about anything except wealth inequality. The rich keep the good candidates off your ballot long before it’s time to choose between tweedle Dee and tweedle dum.

There's a substantial assumption that the wealthy know best how to manage wealth and the economy but it's all predicated on the notion that those wealthy people are willing to act in the interest of everyone, when in fact they tend to act on their own personal interest (I mean, if someone has a net worth of over a billion dollars and they're trying to accumulate even more money, that should give you a good idea how their policy will affect people who are making 40k/yr). They tend not to want to create jobs or increase wages more than they want to improve quality of earnings, because they stand to lose a lot and they somehow want more

I can use my brother as an example for that:

My younger brother is entirely sold on billionaire philanthropy. He watched interviews where people like Elon Musk and Jeff Bezos on talk shows and podcasts, places where people like this go to advertise themselves, and has been completely convinced that they're innovative, smart people.

Smart people who, through just being so damn smart, managed to become billionaires.

They're idiots

Stupidity, cult mentality, “my sports team” mentality, religion, and single issue voters.

I think that it depends on the person. I've heard of enough people who voted for Donald because they like that he "says it like it is", or "he's a businessman", or because they just want lower taxes. Some people are so exposed to rage-bait social media/news content and are always being told what to be afraid of and they vote emotionally based on that fear. My grandfather votes the way he does because he's TERRIFIED of immigrants, even legal ones - because all he does is sit and watch fox news. I think most often, people are busy with their lives, paying their bills, taking care of their kids, etc. and don't have a lot of energy left over for politics. People treat voting like it's team sports. A ton of people voted for Donald because they thought tariffs were paid by the other country, not American businesses. I don't exactly blame people, it's a lot of information and life is probably a lot more relaxed for people that don't follow it.

The rich are clever and very well coordinated

Usually this happens when you dont have a democracy. Establish a system with rank choice voting and a few dozen candidates, and you'll see votes closer aligned with voter interests

Fundamental flaw of the democracy: It assumes that people know what's the best for them

Most are wanting an end to this current system so they’ll ‘play’ it out knowing albeit the struggle, Democracy has left the building and late stage capitalism is showing the disparity of the predators and preys of society

If I’m struggling this much now then imagine how much harder it will be when I have to pay higher taxes

Because it's no longer about benefits or interests.

It's about the "my side won, your side lost, get over it" mentality. It's about the tribalism and making sure you keep your ire focused on your fellow man rather than looking up and seeing the source of your problems

And it's not just the US. It's fucking everywhere.

False consciousness.

Probably unpopular answer, but it's not some clear cut "this political party has better policies for everyone". Republican policies usually are better for people living in rural areas, and Democratic policies are usually better for people in cities. I'm sure people will debate this, but this is the reason why people typically vote depending on where they live. At the very least, they believe that their party has better policies for them and their way of life.

My personal (anecdotal evidence) is that I work for a small business in a rural area, and our main customers are other small business owners (usually self employed or under 5 employees). Over the last 3 presidents, the Obama years were rough for our company, we had explosive growth during the Trump years, and then we've had stagnant growth over the past 4 years. Our largest competitor went out of business this past year, which sent us a lot of new customers, but we've also had a lot of our customers go out of business as well, so we've been pretty stagnant. Being stagnant isn't terrible, we don't have shareholders or anything, but the cost of living has increased and company profit/wages haven't which is a problem. That said I know we're doing pretty well compared to a lot of people here.

Another (once again anecdotal) example is that I have a friend who paints murals full time, for the past 30ish years. He told me that he does well with either Republicans or Democrats in office, but that his customers change. During republican presidents, his customer base is usually local businesses wanting to decorate their stores. During democratic presidents, his customer base is usually towns, state buildings, schools, etc.

But anyways, I'd be very interested to hear from some people living in cities if there's a visible uptick in income/etc when we have a democratic president, or in general what your personal observations are on how which president affects your local businesses/income/prices/etc.

They believe it will benefit them one day.

Manufactured consent

Kind of an indirect answer, but I've heard people state that they vote against their own personal beliefs because they think that there needs to be a balance between "good and bad". Obviously, this is complete bullshit. Even if there should be a "balance", we already have enough problems as is, we don't need the government making it worse.