What she's describing is a very real issue and is not a reflection on her. The fact that you aren't threatened by a successful wife means you are in the vast minority.

https://www.theatlantic.com/family/archive/2019/05/breadwinning-wives-gender-inequality/589237/

"Breadwinning wives also don’t get parity in how household chores are divvied up. As wives’ economic dependence on their husbands increases, women tend to take on more housework. But the more economically dependent men are on their wives, the less housework they do. Even women with unemployed husbands spend considerably more time on household chores than their spouses. In other words, women’s success in the workplace is penalized at home."