I think framing this A/B divide in terms of sex is needlessly conflating different topics. Surely there's a statistical bias of some sort, but it doesn't really add to this conversation.
I think the focus is more on a masculine (A) vs feminine (B) divide rather than sex. It's just that the majority of men lean towards more masculinity than femininity and vise versa for women. I find this aspect to be very essential to the topic at hand, which I believe to be the societal pressures to pick one of the sides and abandon individual thought.