

Because all their friends stay. So to get them to switch, you’d need everyone thay know to switch, which would need everyone they know to switch…
… soon, you need to organize a switch between millions of people, which really isn’t happening.
So the only people on fedi are those ok with keeping multiple profiles, and even then just the ones that value the technical aspects over quantity of content: mostly tech nerds and people with strong feelings about politics.
Block user/community/instance.
Report if advocating for violence.
There’s really isn’t enough time to argue with everyone, and these people are probably used to being argued with, and might even take it as evidence of some big conspiracy. – If you want to make changes in the word, there are more productive ways then arguing on obscure forums.