What's wrong with just allowing users to mute/ignore others? Instead of banning anonymity (which is a ridiculous thing to do), platforms can provide better too

What's wrong with just allowing users to mute/ignore others? Instead of banning anonymity (which is a ridiculous thing to do), platforms can provide better tools to allow users to curate content or join discussion rooms. If you want some type of troll blocker to prevent spam accounts, you can use an anonymous crypto in junction with sign-up for a small fee that is inconsequential to a single user but painful at scale for users that generate many accounts.