You don't see any possibility that the 90/10 split is in some part due to each genders' preferences, in general? You don't think that, in general, women prefer

You don't see any possibility that the 90/10 split is in some part due to each genders' preferences, in general? You don't think that, in general, women prefer more social careers and less staring at a screen for 8 hours? For example, men are well established to be physically stronger in general, so fields requiring heavy manual labor like parts of construction requiring a certain level of strength, will naturally favor men. All else equal, this pulls men from other fields so that the other fields would be like 52/48 women/men. Of course things aren't equal and we see an amalgamation of different factors, some preferential, some physical, some discriminatory, leading to imbalanced outcomes. But remove the discriminatory and that doesn't mean you get 50/50. If not, then by a purely discriminatory worldview, men are severely discriminated against in higher education by their low college attendance rates.