Women work in the Berlin Post Office with calculators, 1928: http://www.alamy.com/stock-photo-women-work-in-the-berlin-po...

The managers, a more people-oriented activity, are all men. But the people working with actual calculators are women. And it was not just this office, this was happening everywhere. Working with a calculator was a woman's job.

More: http://www.history.com/news/human-computers-women-at-nasa

There is a lot of factors to why STEM is dominated by men. Testosterone may be one, for real, but it is not the only one. And it doesn't justify such a big difference in numbers.

I don't know if the engineer wrote something awful or not, but this article is just a justification for the difference as if nothing can be done. And that is not true.