In my experience, LLMs can often pump out perfectly fine starting code for very basic problems. If you're coding up some tiny blog it'll probably be good enough that someone with some coding experience can unfuck the places where it screwed up.

That's not what professional software engineering is about though. You want a codebase built in a coherent, consistent, repeatable way that can be independently worked on by dozens of people often at the same time, and LLMs cannot do that in any real capacity. It might serve as a decent tool for spinning up quick proof-of-concepts (I've poked it to figure out a new framework before, mostly due to terrible documentation making it difficult to figure out how to use specific features) but none of it was production-worthy and never would be.

Furthermore, if you're using it to figure out entire languages/frameworks for you, you're quickly finding yourself in a position where you don't see where it's fucking up, which is going to hit you down the line when you're playing whack-a-mole with a bug or severe performance issue in a giant codebase.