A bit of both,
IMHO. I've come across some surprisingly helpful and generous people, and had some flaming rows too. So yeah, I guess it's a community, at least, to some extent.
It's also, in many ways, a great enabler. You can have conversations, discussions, arguments, all without preconceptions. We don't know, unless someone tells us, whether someone else is young or old, male or female, or what class they are, what religion they are, what race they are, how well-educated they are, how abled or disabled they are, and so on. So you can have a discussion on issues with little in the way of preconceptions.
If you're able-bodied and dealing with someone disabled, it can be hard to pitch it right. Some disabled people seem to find an offer of help offensive and patronising, and others find the lack of an offer of help cold and uncaring. Sometimes, you can't win.
I try to let people do things themselves if they appear to want to, but might offer assistance if they seem to want it. But either way, I could (and have, on occasions) wound up on the wrong side of that.