"its science"

Actually the science is far from settled on this. Pre-natal exposure to testosterone is one of a myriad of factors (and certainly not proven to be the most important or determinative by any stretch) that influence brain development and an individual's character, talent, personality, (pre)dispositions, abilities, values etc.

The author has a conclusion and wishes to ground it in science, end of. It is bad science to begin with a conclusion and find science to fit it.

As a parent, I can advise that is is among the most stressful activities there is but presumably the author presumes the preponderance of women in this field of endeavour is women bcause it is a "social" activity, as if working in STEM was not (it is by the way a lot of teamwork and joint collaborations on projects unlike single parenting where it is just you and the child with not adult companionship and did I mention STEM at Googles pays well too).

We expect little form women in science... We get it!