I don't think there's any chance people will be employed to sell the output of their brains in 20 years, outside of "athletes", or whatever we end up calling people who think for sport. We mostly succeeded at doing this with muscles, and today there's no market for hauling rocks out of quarries manually. We're in the process of doing that for brains too.

AI will outdo people in all practical uses. We're already there for debugging and getting very close for coding, and we're in the middle of the largest investment in human history to expand that to everything else.

If we do a good job of alignment, AI will treat people like those cats "in charge" of train stations in Japan: our every need will be accommodated, but we won't be controlling things we don't understand.