Nostr enables Communities to have any content type they can dream up.
Without daily drivers needing to be specialist in every root event kind.
That's a big opportunity to do better than Big Tech. Not to be deliberating worse by playing copycat with different primitives.
Slack #channels, Discord rooms, etc... are messy solutions to problems Nostr doesn't even seem to have.
We have a canvas to paint really great Community UX on.
Copy-paste makes for ugly paintings. With the messy solutions that people want to flee from, still there.