I am not sure if we should "make all efforts, short of bureaucratic dictates, to make it possible for talented women [...] to thrive in STEM and the hard sciences." Why make any special efforts at all? Didn't you just argue that drive and temperament are two of the most important factors? How many more decades do we have to go on pretending that talented girls are discouraged from doing STEM?

Ultimately, I don't think women should be encouraged to do work that leads to their unhappiness and discontent, especially when such encouragement tends to involve at least covert discrimination against those who are far more suited to it.