It matters when you want to evaluate whether a group has gotten a bad deal in society.
For example, if girls tend to prefer playing with dolls instead of toy cars, is it nature or nurture? If nature, then maybe there's a biological basis for why less women go into stem. If nurture, then maybe it's society's norms and expectations that explains why women more often go into people-oriented jobs like teaching and nursing.
When you look at it this way, you can see why the difference has political implications.
For example, if girls tend to prefer playing with dolls instead of toy cars, is it nature or nurture? If nature, then maybe there's a biological basis for why less women go into stem. If nurture, then maybe it's society's norms and expectations that explains why women more often go into people-oriented jobs like teaching and nursing.
When you look at it this way, you can see why the difference has political implications.