If AI is already doing most people's jobs by then, then there will be a greater chance that humanity would be able to recover from this widespread decline in human intelligence.
AI won't solve human obstinacy, human entitlement, human greed, human short-sightedness, anthropocentric hubris, etc. I seriously doubt anything can, let alone a large language model.
These are not new problems. They are ancient and different people have dealt with them with different levels of success. AI has access to all those strategies.
So maybe one day AI dawns Mr. Rogers persona to solve one problem and Abe Lincoln to solve another.
It can do it at scales no individual or group can, so there is potential to nudge the entire chimp troupe in directions never possible before, in ways that "will serve to organize and measure the best of our energies and skills".
AI tools are tools, like typewriters and airplanes. Problems that people cause in the world (and can but don't fix) are just that: people problems.