What makes you think that has anything to do with gender?
I never heard of those assumptions. Maybe it does happen, dunno; but it sounds like one of those lies “feminists” spread to make women feel more victimized than they really are.
I believe the concern people are expressing here is diversity by itself doesn’t guarantee quality; having a representative that is a bumbling idiot does the demography no favors.
Perhaps it would be better to treat them as developers, and not “female developers”?
Creating/reinforcing the perception a given group is “the others” is bad for promoting integration.
I dunno about the distribution of genders here; but I suspect the reason you got such strong reactions to your post, is you gave a sorta SJW vibe (to be more specific, of the type that spread misandry and put women on pedestals unconditionally. I’m not saying you actually did that stuff, but some of the stuff you said could be interpreted as leaning in that direction). SJWs have put lots of people on edge, ready to defend themselves from serious unjust accusations and debunk falsehoods that spread hate and fear.
edit: Seems I mixed a few people; for that last paragraph I assumed OP had been responding to the convo and didn’t realize there was someone else defending her position. Unfortunately I don’t got time to figure out how to adjust it right now because I got some stuff I need to go do.