Apparently the problem is more than just socializing or gender stereotyping. I clicked on one of the links in the article to a book by Leonard Sax—“Boys Adrift: The Five Factors Driving the Growing Epidemic of Unmotivated Boys and Underachieving Young Men,” and read a few excerpts from the book. It seems that boys have within the last few decades been becoming physically more fragile, more apt to break bones, as well as becoming less motivated.
One anecdote tells of the good money to be made by journeyman plumbers, but when someone tried to recruit just 12 young men to joint a training program with a promise of a good job at completion, they could only get ten in the whole county, and then most of them dropped out. He thought they would be motivated by good pay and benefits, but they weren’t. They just didn’t want to put in the work.
So, I think there’s something going on that is more than gender roles. It seems that boys are becoming feminized both mentally and physically. But the same problems aren’t affecting girls, who continue to be motivated.