I’m looking for an outcome where anyone can find an amplifier if that’s what they want.

How is that not a guaranteed amplifier?

but I’d like to minimize that by just having many platforms with different incentives such that it is unlikely that they would all align against any one persons message.

So if a person's message is something clearly abhorrent like "white supremacy" advocating violence against other races, you're hopeful there is a platform that person can amplify their voice with their ideas to the general public?

It’s unlikely that a specific user would be unable to find an instance that accommodates them, even if larger instances won’t.

My guess is that as the user increases the level of their bigotry, if the instance still allows is, that instance will be de-federated by nearly everyone. So they have their own echo chamber at that point. How is this different than what groups like that have done for decades prior to the internet with a private newsletter mailed out? This is essentially the situation we have at present.

What are you advocating that would change this?