Isn't the fact that men and women do such differently-paying things after college itself significant? You seem to think the article is arguing something more than it is.
Well, most discussions revolving around this try to frame it as if women are being paid less for the same job a man is doing. It's disingenuous, and needs to be scrutinized so that we can all be on the same page and not make knee-jerk reactions that can cause irreparable harm.