I think part of the problem here is when articles like that like to use titles such as:

"Young women are getting richer, as young men get poorer-

More millennial men are earning less, even with the gender pay gap in their favor, the U.S. Census Bureau reports"

This isn't a men vs women thing. It's a young adult thing, and like you said it's something cultural and societal. The fact that young women are getting educated is a victory for everyone, but MarketWatch would rather use it as social justice bait.