I've been meaning to re-watch Korra, but I remember even the first time I watched it being a bit disappointed in the "enlightened centrism" where they are trying to paint every conflict as pacifists vs extremists.

I think it's similar to looking at BioShock 1 and BioShock Infinite. There's a lot of writers out there who just use politics and ideology as a setting for the conflict rather than actually being central to their message. It's simply a solid formula to make a villain: take any sort of stance and push it to violent extremes. Comstock is a religious zealot, Andrew Ryan I don't think ever even mentions spirituality if I remember. Ken Levine's message in the two games is not about religion, but extremes.

There are benefits. It makes the villains more nuanced and relatable. It gives the protagonist room for doubt and allows for some of the "good" guys to take on antagonistic roles. But Korra also ends up supporting an oppressive regime, and Booker DeWitt gets shoehorned into fights against the people rebelling against his enemy because... Reasons?