A lot of this is because the prevalent attitude has been ‘it’s the internet, it doesn’t matter’, and that allowed people to do things that we, as a society, decided long ago that people weren’t supposed to do.

Reddit has been going downhill for a decade. The problem was that there were no viable alternatives. Now that /u/Spez has pushed the issue, he forced enough people into Lemmy that it is suddenly a viable alternative. I call that a win!