Whatever the ideal decentralized setup may be, the truth of the matter is that the current setup makes it significantly harder to surface content from instances outside of one’s own. I’d prefer to point people towards lemmy.world than to send them to a smaller server and have to field questions about why the servers they’re trying to join are out of date or possibly not available at all. As people get more comfortable with the setup, they can branch further out into the federation as they please.