In Youtube - Yannick Dalbin – Ce que 1 an à laisser l'IA coder m'a appris sur le métier de développeur, he says that if there's an issue with what the model does, it means your workflow/prompt can be improved.
There's probably a limit to how much time you spend improving the prompt and workflow vs doing it yourself.

and

Complexity has not gone away. It has moved from syntax and implementation to architecture and decision making

Code review