I grew up kinda poor, I don't think anybody would imagine it just looking at us but money was a constant cause of stress and many many fights. So many debts, power cut, phone line cut due to unpaid bills etc. That taught me one thing, I don't want to struggle the same way again and I don't want to spend my life with someone who doesn't feel the same way about money.
That doesn't mean I'd pick someone rich that I didn't love over someone broke that I do love. But I found that the approach to money is more important than how much of it you have. What is "necessary", what is non-negotiable, what is a luxury and what is senseless spending? What will be our priorities once we get the bare necessities outnof the way? Does my partner value spending over saving? Is dining out at a nice place once in a while unnecessary for him? Does he prefer spending money on items or experiences? Is it comfort over cheaper prices, or do we decide to slum it in order to spend the money on something better? As long as we're on the same page, I don't think I'd care if he didn't want to become a high executive or didn't earn six figures.
Financial security is very important to me but everyone has a different idea of what it means to be comfortable. I'd want to know that we have our bills, home, health and emergencies covered. I'd want to know we wouldn't be a few bad months away from having our gas or power cut, or being on the streets. I'd want to know that I can trust my partner with priorities and budgeting. Other than that, I don't mind. I have my own income, it's not a High Income™ but I'm content with it, especially since I usually get to leave work on time and my workload doesn't make me want to depend on Adderall or cocaine to cope with 160 hour work weeks. I'm not an engineer or a doctor or a lawyer, I'm not in finance etc so I'll probably never earn big salaries either.
I wouldn't call myself ambitious regarding career or money, I have other needs and wants in life so I don't expect that from a partner either. Actually someone whose entire mental energy is on the next promotion or the next raise would bring me down big time. It'd be amazing never to think about the cost of something I want to buy ever again, but not at the cost of my mental or physical health and I wouldn't want it for my spouse either.