This is all very right, but I'd like to add this: As your capacity to deal with abstraction (which is a function of intelligence and executive function and, to some extent, knowledge) grows, you become more and more constrained by the extent to which you can manipulate symbols. AI-based solutions for that are potentially really powerful, and that's the mechanism through which, as TFA says, "intelligent, educated people with working reward circuitry stand to gain more from AI."

And I'd also add that AI strongly disaggregates the returns to different levels of the capability to deal with abstraction -- higher levels get more, lower levels get less -- rather than uniformly boosting returns across the board (unfortunately). Of course, this has been the trend of information technology since at least the '80s, but now the slice at the top is really small and the returns very high.