Your condescension makes it hard to take your argument seriously. But setting that aside for now, let’s look at it. You make the accurate point that there are biological differences in genders related to childcare, and that they are evolutionary (see here for an interesting article on this). When you move up the hall from Biology 101 to philosophy, sociology, psychology, economics, political science, anthropology, and yes gender studies, we find this biological bit of history says very little, if anything, about our ethical (or even practical) responsibilities towards child-rearing in the modern world, which is the central topic of this column. Much research in this area suggests that multiple parents, and even extended parental figures, being active in child-rearing confers numerous advantages to those offspring. In short, higher brain functions equivalent in both genders have much more bearing on the topic of childcare than say the presence of mammary glands in female homo sapiens and not in males.