The rate at which AI is capable of producing code is intractable for humans to deal with. Right now the bottleneck is human reviewers. If AI ever becomes effective at generating provably correct code, it's joever.
It's also likely that there are thousands who aren't hustle-culture oriented who have been looking for so long that they don't even count as unemployed anymore.
The proofs are not meant for human consumption. It's for the AI to know to try again rather than spit out hallucinations. Of course there's a leap of faith somewhere here.