Or it's a systematic sexism that has deep roots in human biology and thousands of generations of sexually dimorphic specialization, and I can't believe we've successfully convinced multiple generations of westerners now to pretend that men and women are equally suited for all roles, including child rearing.
Now we need an article which takes an honest look at the possibility that gender imbalance in STEM (and other fields) is at least partly a result of similar specialization for cognitive tasks, where researchers like the author of the article are closer to extremes of an ability distribution. But 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.