5 million actual people telling you that ‘x’ political view is common and popular, causing you to doubt, or at least temper your own personal beliefs.

This isn’t misinformation. Lemmy gives you skewed image of what political views are popular. Truth social does the exact same thing but from the opposite perspective. These are just groups of people self selecting onto platforms they most feel comfortable at. Having different political views to that of yours is not misinformation and platforms shouldn’t be banned because of it.

Tell that to Musk; X bans TONS of people over their viewpoints.

Again, not in any way exclusive to twitter. Go take a look at lemmy.ml/modlog for example. These are both privately owned and the people running them are free to moderate however they desire. If you don’t agree with it, then do go there. That’s what I do with .ml instances too.