You would prefer the converse? You prefer people to base their actions on what they wish to be true rather than what they know to be true?
I would perfer people based their actions on both. I don't see the either/or situation the professor seems to believe. I think you can be educated and maintain your beliefs and values. The knowledge base of man barely scratches the surface of knowing all there is to know. A true intellectual acknowledges this huge void. It is the ones who think man knows almost everything that really worry me.