Big biznis is hard. Once you find something that makes money everyone is trying to copy you. Big companies have to work really hard to compete in most areas, hiring the best brains and using the best strategies. A lot of these companies are publicly listed and accountable to shareholders, and these shareholders normally have a lot of say about who is running the business at the top and will kick out poor performers. It is the same even in stuff like football management.
If women were just as good as men at these top jobs, trust me, the market and canny shareholders would be stuffing as many womun in these jobs as there is men. They don't. The top jobs are mostly filled with men and the odd lesbian just to keep the PC brigade happy.
Men's reasoning is more acute in general because it is less clouded by social scheming elements. Just different types of brains, women are better social schemers.
Also, re: physical attributes, most men are fitter faster stronger than most women, by a LONG way. If this were not the case and there were significant overlaps then women would be entering lots of men's sporting events and competing with them on their terms. They don't.
Milk and sugar?