I agree with the premise of this post, but not the details – there is a vast difference between a woman who wants to be a doctor, and a woman who wants to be a construction worker, electrician, plumber, car mechanic, etc…the masculinity attached to blue collar work is not arbitrary, or the result of western definition of gender roles. I would also add stress-related jobs such as surgeons, CEOs of companies..people whose quick decision making abilities have dramatic consequences and who need to be able to work well under pressure. Psychologically, studies show that women have a lower threshold for stress and are more easily overwhelmed (experience tells me this as well).
Women are also naturally more passive, so leadership roles generally are not appropriate – women who are aggressive tend to be more disliked by their employees (specifically their female employees) than men, because a man who is assertive is the norm, and for a woman it is feigned or exaggerated beyond socially acceptable parameters. I can quote the peer-reviewed studies I’ve seen to this effect if necessary.