_Here_ is where they misrepresent what he said. He didn't suggest that men and women differ in their suitability for different roles, but rather that men and women _generally_ differ in their suitability for different roles. There will always be deviations from the norm, and given the fact that there are known physical and psychological differences between the sexes[1], I don't see why those differences wouldn't lead to differences in career choice overall. However, there are plenty of women suited to be engineers and plenty of men not.
Edit: To those downvoting me, can you please explain why? If I am misinterpreting something, I would love to know the flaw in it.
[1] https://en.wikipedia.org/wiki/Sex_differences_in_psychology