But this is why it's boring. You've just said its a "common pattern" which means you're fitting posters into schema you've already developed instead of engaging discussion. That's called prejudice: you're primed to see some underlying motive without actually doing the work to discover if it's here.
Also Fencedude's comment isn't "questioning", it's condescending, sarcastic, arrogant, presumptive.
Pointing out structural sexism is the real prejudice!
Where have I heard this pattern before...