Consider the hypothesis of "sexism against men": society considers all women valuable, but only values men who earn a decent amount of money. Men who earn little find it hard to date and have children.
Wouldn't this "sexism against men" spur men to choose high earning (but maybe not fulfilling) professions, while women would feel more free to aim for personally fulfilling (but lower earning) professions?
By the metric of earnings this might look like sexism against women, but by the metric of life satisfaction, it might look more like sexism against men.