How do you figure? Intelligence / multi-talented-ness, and interest in changing the world, aren't necessarily correlated. Most "geniuses" still probably just want to get reasonable wealthy and retire to pursue their hobbies. (They just have more interesting hobbies than the average person.) And, for people who weren't born to wealth, the FAANGs are a good place to get one's f-you money from, without necessarily needing to dedicate the entirety of one's motivational resources to solving work-related problems.