It's weird.
Ultimately aren't these exclusive groups a barrier to inclusion? They must stagnate the integration of people with others.
I've never liked the idea. To me it's BET levels of misguided. Let people be people. A group of gamers banding together solely because they share the same gender is inherently sexist.
Perhaps. But you're assuming that the default mode of operation (i.e. no exclusive groups) doesn't also exclude people implicitly. And to hopefully explain that in more detail: look at the third post in the first OP image, from TheBlackadder:
Mmm... I don't really quite get the phrasing, 'safe environment.' It's safe enough here, isn't it?
It's a pretty innocuous comment, as these things go. It's not an attack, it's not malicious (at least, I assume it isn't--I suppose it could be dripping with sarcasm but I doubt it). But what it's saying is, on some level, exclusive. That poster thinks the forums are safe for everyone, surely this must be the case? After all, that poster's never had any concerns about not being able to voice their opinion or not being able to tackle any criticisms leveled at them. Everything's cool.
If you're the kind of poster for who that isn't true, and if you happen to see a trend where a lot of the people experiencing problems on the forum all happen to fall into a certain group, then is being out in the open going to be safer than trying to close yourself off and isolate yourself from the rest? That's more of an open question. My sense is that TheBlackadder either doesn't understand that there are posters who don't feel they can express themselves freely, or doesn't believe it. And there are probably a lot of people on those forums who feel the same way.
So while I'm not the biggest fan of creating an isolated group with strict rules on membership, I can absolutely understand the desire to create a safe environment. Ideally, you'd make the forums hospitable enough that it becomes what TheBlackadder thinks already exists: a safe space for EVERYONE. Given what's been going on (and given the history of, oh, the whole internet), I'm not holding my breath. But ideally that's what we would have.