I agree in principle that .world containing most of the fediverse’s activity kinda isn’t great for the idea of the democratic nature of the fediverse. However, the point of the ‘verse is that anyone can spool up an instance if they dislike it, or start more communities on existing instances. If .world were to disappear it would suck, but that’s part of the problem with any instance in an informal community. Any of them can disappear.