My immediate thought when I saw this a few days ago was "sampling bias" -- not that the author had a biased sample of professional women, but rather that professional women are a biased sample of women. Given the social environment -- pushing both females and males away from what they might have preferred as a life trajectory -- I think it's very likely that the average professional woman is significantly more aggres…
Saying that this is inconclusive is a strange thing to claim - the evidence is plentiful. You are describing a serious but separate problem which adds to but does not explain this difference.