But this is a good thing for egalitarians. It offsets one of the most unfair aspects of the knowledge economy: that some people get to have much more fulfilling and remunerative careers than average people because they were lucky enough to be born smart.

It's actually the opposite. People who are "born smart", will leverage AI to get more knowledgeable even faster, use it to learn new things faster, use it to churn through data to find patterns and opportunities, and use it to do labor for them, so they can make even more money than those not born smart, who will just use AI to ask it what's 3x3 and if the earth is flat.