That remains to be seen, but my guess would be that if you do it like Ladybird (with human-in-the-loop and a decent level of review) then probably yes, if you do it like Bun (1M LoC in a week) then probably no.

I did recently read an article about how, due to better training data, an AI writes better code in Rust than most other languages.

How that translates to the number of bugs, I don't know.

I would think that existing bugs would be caught, but new bugs would be introduced. The problem remains, but at least it has a new name now.