Or they are traditional full time mothers, raising children rather than paying other people to raise them.
As John Kerry showed, the easiest path to a lot of money is to marry into it. And looks are obviously not necessary. If easy money is the goal, college is mainly one way to meet prospects.
College doesn't hand out brains, they just set up obstacle courses to see who has them. Of course there are many exceptions but most people say they use very little of what they learned in college.
Most self-made rich people and famous people did not have the time to spend 4 years of their youth in college. Smart people tend to make higher than average incomes no matter if they are college educated or not. College education does not necessarily mean more income, excluding government jobs. Correlation does not imply causation.
There's nothing wrong with having a college education, just that in the last 10 years it has become an overrated scam that takes advantage of people.