Women use their credentials more than men because they say a subset of men don't respect them without their credentials being aired. If that's true then it makes sense that the benefit to men is nil because they're viewed competent by default whereas women have to prove competency. Somewhat anecdotally people regularly confuse me for a mathematician although I lack any degree. I just like math and using it to prove my point; plus I'm kind of a late bloomer to math so it's more relevant to me than rote.
Curious that you say that, because I remember recently reading that women on average are unwilling to "date down" in terms of higher education levels, while it's not really a factor for men.
That's the most charitable interpretation I can think of. Wouldn't you agree that stereotypes are most impactful with first impressions and then diminish over time for those who know you?