"It's impossible to imagine a system of education that didn't involve promoting a viewpoint...."..etc

ummm...yes, I guess so, Kevin. Though I'm not sure what that shows. It 'almost' becomes a tautology to state it.
Education can promote careful and reasonable study of alternatives and employ techniques to make this possible. I have, thankfully, had a few teachers & courses during my education that did a very good job of explaining fairness, reason and leaving ultimate decisions to the student. Now...I suppose that can be interpreted as 'stacking the deck' against narrowness and self-interest..*wry smile*... I kinda like that sort of one-sidedness.