Because your parents actually raised you instead of having a t.v. set do it while they either worked or dealt with the before and after of divorce.
Because you had the freedom to go to the end of the block around age 8 or 10, while parents these days just about have mental breakdowns when 12...
Private colleges are expensive, whereas community colleges are generally relatively cheap. Many older students will have family obligations that make it impossible for them to go to a private school.