There has been empirical statistical evidence (and that's not saying much btw) that women differed from men in general "intelligence" in the sense that in average, their IQ is relatively the same, but their bell curve was different. Men's IQ "bell curve" is flatter, meaning that there are more really dumb men than women, but conversely, more genious men than women. IOW, men have higher variance in intelligence.
If these studies are correct, one would actually expect men to outnumber women in top research academia, if "intelligence" were the sole criteria for the job, and thus "affirmative actions" of gender in order to equalise women and men in numbers in these jobs could actually worsen the quality of academia.
But this is politics. One can always state that the policy of creating a culture of equality is more important than optimizing the quality of academia. I have no personal opinion on this matter.