No, the distinction is that there's a well established physiological difference between the sexes. It's widely accepted that the top-level women cannot compete with the top-level men -- that's why there are men's races and women's races. The same difference doesn't exist between same-sex Italians, people of color, etc.

That physiological difference exists all the way down the spectrum of rider skill-levels as well. It's reasonable to assume that if you're faster than about 50% of men, you're probably faster than more-than-50% of women, given the physiological disparity.

I guess the OP simply doesn't understand this.