That’s actually just categorically wrong and frankly easy to find out. First of all the one that jumps to mind is AOC, but also just in general apparently econ is the third most popular study for congress members, behind politics and law.
My state rep lives (more or less) across the street from me. He wins because he gets things done and is generally a nice and honest person. His educational background as a lawyer doesn't seem to enter into the reasons why any of us vote for him.
My congressional rep and our two senators - I couldn't even begin to tell you their educational backgrounds. I can tell you about their policy positions (and in one case, their abject failure to actually do anything related to them), and a little bit about their personal history.
I’d have to know your district to give you more details but I promise you there’s hundreds of positions across America in elections that get filled by people with a matching background college education. At the very least I can point to judges who have legal backgrounds.