Men are in general more extreme. Top top extremely good is therefore more likely to be a man. Also young men can be insanely focussed on one thing, ignoring all creature comforts for years. I seldom meet women who are comfortable even missing too many meals. When women hit their mid 40s some get that same driven quality 18 year old men have. But they then are competing against a male of the same age who has already put in his 12 years of nutty work levels. Very tough competition.