I agree it's not exact analogy but I think it gets across the most important point.
Servers aren't forums or subreddits, they're mainly gateways onto the wider network.
Servers have a Local timeline and their own standards of behaviour, but most of the time most conversations will be with people on other servers rather than within a server.
If servers were only talking to themselves, they would be in danger of being bought by Elon Musk etc.