"Tech people want to believe that the gender disparity in their field is shared among all the STEM fields"
It's convenient for both women's studies departments and tech recruiters to pretend other fields don't exist. It is taboo to talk about it, to the point that I haven't come across any serious piece of writing that dared to seriously contemplate the question of "what are the girls choosing to do instead?", but I don't think it has much to do with psychoanalytic undercurrents.