Why wouldn't they? You join the platform, make friends with folks who say stuff like "Vance and Singal shouldn't be here but the people that give them death threats should", then they tell you to hop onto "Cleansky" which has its own Appview that filters out Vance, Singal, and platforms your buddies. You don't need to make a new account or anything.

The default experience just needs to be good enough. Beyond that folks with strong opinions will filter into moderation communities that offer them the curation they want. That's the technical side of this at least. There's larger problems around community culture but unrelated to tech.