I was discouraged from going to college
Have you ever heard someone complain that "I was discouraged from going to college" as the reason for them not attending?
Some people listen to discouraging voices, from their parents or "society", yet other people ignore those voices. Some people obey, and some people stubbornly refuse. What accounts for the difference?
Elisabeth Kubler Ross was strongly discouraged from going to college, and yet she stubbornly persisted. What personality type(s) would allow her to do this? Stubbornness, lack of a need for social approval, ability to defer gratification... all of these have been shown to be innate.
Therefore, an equally plausible explanation for someone not going to college is that they lacked the genetic threshold to overcome the resistence, and they had an innate need for the approval from their parents or society, so had to abide by their wishes. It's not hard to think of a list of people (Napolean, etc) who didn't need social approval, and persisted in their goals despite enormous odds.

