First, guy's pride is superior than anything on earth. So when you meet a guy that having a so so type of achievement in his career, it would be hard for him to swallow it down even if you don't mind that he earning lesser or not capable than you. Eventually inferior will become the issue and normally it won't end well.

It doesn't mean that you must/should find a guy that smarter/capable than you
Instead, you need someone that having high EQ. Its quite subjective actually but guys with high EQ can really manage their life and career well even though they are not professional and earning normal income.

People thinks that having relationship with doctor isn't that good because its hard to have common interest because due to long hours at the hospital, what else can a doctor be interested at other than hospital thingy?

Wish you good luck and be humble. You will meet the right person when it the times come