Addressing groupthink/echo chambers widely, I’d say that the Net itself breeds such faster than physical spaces.
Start with the name of this forum. Large Penis Support Group.
Well, that’s going to draw people who have some interest in penises. Some have an avid dislike for possessors of vaginas.
Then it made the rounds of sites like Cracked.
So you get people interested in humor in many forms. Some with little interest in penises.
Groupthink is the way of the Net, and my experiences are that the ladies here do the best we can to limit that. We do have a lot of common ground, and that’s where we gather.
Some choose to congregate together.
Some “women” on the site aren’t. This, too, is the Way of the Net.
Some are sex workers trawling for clients. (Same with some men. See the OnlyFans sludge.)
It is a chance to be a different “you.” (I, a cis woman, interact with more humans on the Net than I ever could in real life. My physicality isn’t in the way here. Typing doesn’t stutter or lisp, unless you make it do so, shyness is easier overcome.)
You can try being a better you (wow, wouldn’t that be cool?), buuuttttt.....Way of the Net.
What you won’t get from the women is HiveMind. Watch the small differences that make each poster unique. See where we have some back and forth (not the poster, the discussion) about how a situation is different for each of us. See where the hot buttons are.
Some women care about size, and they have random hook ups, or did. Some are with their high school sweetheart. Some have had very few male partners. Some, many.
Most are clear that size of the peen is secondary to the size of the mind, the metaphorical heart, their compassion, humor....you know the drill.
We might be busy as bees, but we have no queen, size or otherwise.