But it’s his instance. The whole point is that you run your own if you want a different approach to administration.
You seem to keep looking at this as the admin of your self hosted instance with only you as the only user.
With large instances there comes the responsibility of moderation and that is a thing that Gargron has been lacking with years ago. And keeping the door open for new sign-ups while the idea of Federation is to decentralize, and people repeatedly asking you to show new users to other instances but not doing so is just plain horrible imho.