There are real advantages to being anonymous though, especially given the well-known tendencies of societies to end up in manias of intolerance.

I think you can have platforms that encourage civilized discussion w/o needing to link that to a real name. (HN is a great example of that, in fact!)

And conversely, even a platform with real names attached can still end up being extremely uncivil (e.g. Facebook).

There's also a long (pre-internet) history of people publishing good stuff anonymously, for one reason or another.