The "lack of knowledge is an unambiguous net negative even to the powers that be".
I think it's far more ambiguous and less measured of a net negative, than it is a clear, measured net positive for the "powers that be" if we define them as the wealthy.
You can take a very clear, measured look at wealth distribution over the past 50 years.
I have never worked with anyone in business who wished their customers had less economic/financial literacy. Just endless frustration.
On the other hand, you have a massive contingent of people who are constantly scoring own goals because their economic insight is purely an emotional surface level intuition.