Maybe not, but think about who wants to go study sociology? Gender studies? Even for other subjects, where the current academic debate is not 100% liberal, I think it's natural that liberals will be more attracted to the career. I suspect smart conservatives are more naturally inclined to use their talents in the private sector, which, after all, their ideology actually respects, while for smart liberals it seems there is no higher calling than academia.
But especially in the case of certain subjects, I just can't see most conservatives being too attracted to them.
Many people get into economics, for instance, because they want to help society. Once they are in, however, what prohibits them from “falling in love” with free markets? It is these markets, after all, that ushered unprecedented prosperity in the Western World. One can come out from the study of economics being quite conservative.
This does not happen, of course, because the process of teaching has been hijacked and substituted with indoctrination. Nowadays even science professors feel free to express political views in the classroom.
About your second point. We witness an interesting (at least to me) phenomenon where MBAs elbow each other for top jobs on Wall Street, make a ton of money and then... send donations to the Democratic party and denounce capitalism.
I do not claim the ability to diagnose properly all of the problems, but our culture is sick, very sick.