I don't think he's saying that liking college is a bias. Or rather, he is, but I think he's saying something subtly different (which implies the former): that t

I don't think he's saying that liking college is a bias. Or rather, he is, but I think he's saying something subtly different (which implies the former): that those who denigrate college, or are "meh" about college, take a "social desirability hit" - they are likely to be seen as either unintelligent manual labourers, or Philistines, or annoying self-taught outliers, or insulting people who have put in the hard work to go to college, or a combination. And therefore young people grow up in such an environment and many of them have a strong belief, in such an environment, that college is a necessity, and don't really consider the evidence dispassionately.