Well of course! It's easier to control people who don't think than to control those who do.Instead of making them think, they have something to think for them.
What every high school should be mandated to have is a few philosophy courses, or a few liberal arts courses, or else some other courses designed to teach students how to think. A little more freethought in the world can hardly be a bad thing.
I have a theory that it's impossible to prove anything, but I can't prove it.