I am the primary wage earner in my marriage, although we are both employed. I have the higher educational level, but am not necessarily the more intelligent of the two of us.
(I'm more educated, he's much quicker in thought than I am.)
My b/f is the primary wage earner while his wife stays home with the kids.
Both of my parents were professionals (engineer, dentist) and both worked outside the home. Both of them cooked and cleaned, but my dad was the guy's-guy who did things like household repairs, changed the oil in the cars, etc. He taught me to do those things and I do them. My husband never did learn those things from his dad.
I don't know what that says about our gender roles, but there it is fwiw.