My parents here are like that. Or, my mom at least. I'm not sure how much of it is actual worrying about my future and how much of it is wanting bragging rights to the other housewives in the neighborhood and her parents back home, but she still thinks I should find a "sensible career" instead of acting.
You'll just have to show them is all. Just be five times as good at what you want to be so you can make them eat their words.