Might be the jobs are all non-intellectual and there is the opposite effect.

I think you don't understand that biological evolution happens over very long spans of time. Humans short-circuited a lot of evolutionary pressures already and introduced some new pressures.

I think you also overestimate the effects of AI. Did writing or public education make humans "smarter?"

Equating having a job with intelligence seems quite a stretch.

Maybe - if you're willing to endure the dystopian nightmare of letting the less fortunate suffer and die. And if you are willing to let the less fortunate suffer and die, then I guarantee there's someone above your paygrade who thinks the same as you and will gladly watch you suffer and die.