This assumes that there is some essential demographic difference that causes fewer women to end up in these professions. While this may be somewhat supportable in the few fields where muscle mass is relevant, the contention here is that disparity in fields like higher education or software engineering is in itself due to sexism. It's nice that the pay gap isn't that large for women who do manage to enter these fields, but that doesn't address any of the underlying structural causes that prevent women from entering these fields in the first place.