I presume that you will be around to cry foul every time someone claims women are better at dealing with interpersonal relations?

It's a debatable empirical question whether men or women have any innate advantage (or are statistically more likely to have an advantage) in any given field. If the evidence points one way, does that make reality sexist?

Young men are better suited to succeed at professional football today than women. What is this if not "a chauvinistic belief in the inferiority of women?" Simple answer: it's an objective fact.

I find it amazingly unlikely that men and women are identically suited to every type of work. Men and women have historically, on evolutionary time scales, focussed on different types of activities.

You say "I believe it's completely unacceptable to speculate on these matter". That is labeling something as an unacceptable thought. You're saying "I don't care what reality it, my morality trumps reality." You are advocating creating categories of taboo thought crime. I suggest you either reconsider the implications of you views, or admit that this is what you are advocating.