> Because it takes a massive amount of developer work

You know what else takes "a massive amount of developer work"?

"any LLM-generated code must be reviewed by a good programmer"

And this is the crux of the matter with using LLMs to generate code for everything but really simple greenfield projects: They don't really speed things up, because everything they produce HAS TO be verified by someone, and that someone HAS TO have the necessary skill to write such code themselves.

LLMs save time on the typing part of programming. Incidentially that part is the least time consuming.