It means I won't be intimidated by my partner's credentials or success. "Over-educated" is not a thing.

If men were free to chase whatever professional growth they wanted and women just had to stuff it because they would be avoided by men if they were "over-qualified" according to you, then that's a dynamic I cannot wait to see completely obliterated. I'm not saying only one partner being a provider or sole breadwinner is a bad thing, but it absolutely does not need to be the only role possible. These men you and GP talk about need to figure out what else they can bring to the table in a relationship, because the ability to put food on the table is hardly the only "desirable" thing people see in a partner, and it doesn't seem like a great thing to tie your self-worth to.