Most streaming services don't have a 'community'.

You're a netflix customer, not a part of a community. There is no Netflix or Amazon, etc community.

YouTube has a community though.

See how that works?

it definitely helps that anime tends to be niche and not mainstream (though there's still some toxicity, ofc).

There is no war in Ba Sing Se.

Most comment sections under crunchyroll episodes are super wholesome and cheerful, people are mostly celebrating how good the episode was and how cool the next ones will be.