Why is that better?
User control & flexibility > illegitimate authority. Also, I remember an earlier, untamed, unrulier, more subversive internet than this corporate-friendly crap: it was funner.
any community anywhere online still needs to remove CSAM and gore and other things.
Legal compliance is different from legally unnecessary moderation.
Because a hashtag under a no-moderation concept could still be hijacked.
Not really: Nostr content is cryptographically signed. User's client subscribes to some content curators who post as signed events their tags for other events. The client processes these tagging events to filter according to the user's preferences.
Some proposals already exist:
the fediverse will never be what you want it to be
Not the topic of discussion, which is function & protocol.