It is similar to the misnomer about going to college means you will earn more. When, it is just that those who can go to college are of higher IQ, and so, will earn more money

I love this. It seems so obvious now that you point it out but I never thought about it this way and this is absolutely true. I now recall how a ton of people who I perceived as being low IQ started college, but a lot of them didn't finish.