He is somebody with a very high level of education, and no life experience. To categorically dismiss drugs, or a scholar like Friedrich Nietzsche, as decadent and anti-intellectual is a sign of immaturity - however old or young the person is chronologically. He'll change his mind, or stagnate. This guy has a self image that is a classic for his type, and it is something that he must untangle for himself.

I used to be a bit like that myself, in some ways, in my youth.