This is like saying that the variation in height between women is much greater than the variation in difference between men and women. The outcome is still the

This is like saying that the variation in height between women is much greater than the variation in difference between men and women. The outcome is still the same: The average man is taller than the average woman. When the variation is cognitive, it will produce very real world statistical differences between men and women. You can't pick a random woman and a random man and assume the woman is inclined toward X and the man isn't. The statistical difference is too small to predict that. But take a thousand men and a thousand women and the percentages will bear out the small statistical difference.