Maybe both men and women irrationally pursued more PhDs than made sense, but the men were historically more likely granted the opportunity to find out for themselves why it was a bad idea ;-)

(I get your point though. "Just sayin'", as the phrase goes)

Aren't the "worthless" (market-wise) degrees (humanities, social "sciences", etc.) mostly women? Also, many men pursued CS even back when it's wasn't such a lucrative career. I'm not convinced that people choose their professions particularly rationally...