Exactly. There are smart people everywhere. If you have a good idea, you can find funding. (and anyway, many businesses are cheaper to bootstrap today than ever).
If you don't have ideas, you don't have anything. I don't think you'd get a good reception saying "I want to get rich, should I become a neurosurgeon or an oncologist or a periodontist", and I don't see why this gets any better a reception.
I get that you're not necessarily asking for business ideas JUST to become rich, there are all kinds of reasons to want to run a startup. I just can't really see what would cause one to put that particular cart before any horse whatsoever.