What I do not see mentioned, that experts of propaganda clearly know that more educated people are more susceptible to propaganda.
For those who want sources for this, please refer to Jacques Ellul: Propaganda: The Formation of Men's Attitudes.
This is my own wording (and like a poor one): for propaganda to work, the population must be educated. There is little room to inject your machinations to the simple and straightforward thought processes of less educated men.
Those who deal with more abstract and complex thought, the more educated, are easier to lead astray with minutiae.
For a contemporary example, just look at MMT and the mother of all bubbles forming right now. A simple man might say if you print more money, money will be worth less. He would be at a high level quite right. Even if he gets many details wrong. The more educated mind might be more inclined to try to understand QE, money velocity, money supply etc, to the point where in the end he is probably less wise than the simple man.
"The Party told you to reject the evidence of your eyes and ears. It was their final, most essential command."