I guess I don’t understand what he is fighting for no. Twitter users are free to say whatever they want. Equally, companies are free to spend their dollars in any way they want. If Twitter and its users really want free and uncontrolled speech, they should move to a completely user-subsidised model with no ads. “Uncontrolled” or unmodderated speech isn’t always brand safe content, so it seems valid advertisers wouldn’t be keen to sponsor that. Maybe I’m missing something but that’s how I see it.
I see your point, and I agree that it would be nicer to just have to follow one community instead of a million smaller ones. There’s always cross-posting. When you make a post and there are several communities for the same thing, post on the smallest one and then cross post it on the other ones.
Each community has a reason to exist, maybe different rules and different moderators. It’s up to them to arrange a merge or the admins to archive inactive communities.