I think this says a lot about what kind of teenager gets into an economics program, or at least the author's perception of them.
If learners can't accept the orthodoxy, if it causes them cognitive dissonance, then where does the problem lie? Is it within the student -- unable to grasp the fundamental Truth revealed in the gospel of "Good Old School Chicago Economics"? Or are they (unconsciously?) rebelling against indoctrination into a death-cult which is worshipping the antisocial, careening towards an apocalypse, and telling them "There Is No Other Way".
I dunno, it's probably because undergrads are dumb.