[deyouz]

>Or it's a systematic sexism that has deep roots in human biology and thousands of generations of sexually dimorphic specialization

Are you saying women are naturally more nurturing than men? And more inclined towards childcare?

Because I vehemently disagree.

>I'm relieved to see a take that questions the tired, pervasive assumption that STEM is simply not welcoming to women because old white men are sexist.

It can definitely be a factor. And even a more important factor is the fact that women can feel unwelcome in tech. At Oxford only 10% of the undergraduates accepted to study computer science were women. Now imagine being a woman in that class. You might feel like you don't belong, although you might be friends with your predominantly male classmates. Some of them will make jokes at the expense of your gender, others will hit on you, and the list goes on. Obviously not all of them will treat you differently, but some of them will, and that's enough to feel unwelcomed. And thus, you might be more inclined to leave tech for a field with more women, like biology.