I'm not sure I fully agree with that.
Yes, open dialogue is valuable and in many cases highly productive.
At the same time, it's also not always serious. I, for one, have been struggling lately with issues pertaining to my Ptsd from conditions I'm experiencing in real life right now. There are a couple of supportive people I've spoken with in PM that are in the space to talk about it, but the general chat seems to mostly be for fooling around, fun silliness, and group bonding. This is also important.
Both of these are important. I need the intimacy of the one on one conversation to help me work through what's going on, and I need the silly banter with everyone (minus the whole retard in the room thing, but he's easy enough to ignore when I'm bored of fucking with him) to lighten my spirits and figure out who I connect with best.
I don't know if everyone/anyone else feels this way, but at least for myself; I sort of prefer the separation. After my experience I've always had a hard time with large groups, and easily get overwhelmed.
I understand that as people pair off in PM newer people or people left un paired find themselves left in the drift with no one to talk to. However,
I think the long term discussion forum can help them while they're waiting to determine who they might like to talk to/where to start. It also helps kill time while waiting.