I don't see why it makes sense to have females occupying these roles if they are performing them at a lower level than that of a male. In the case of an outlier female who is superior to the average male (which does happen) they won't be superior to the outlier males. And in reality all the party members are always outliers in the realm of combat proficiency.

I agree that females are shorted in personality and utility variety but pointing to a physical/magical dichotomy in particular isn't helpful, because it is (possibly the only) field in which the imbalance is justified. Stereotyping within the mage role is another matter entirely.