My 3D printer sometimes prints and sometimes makes spaghetti. Still useful.
3D printing is largely used for prototyping where its lossy output is fine. But using it for production use cases requires fine tuning it can be 99.9% reliable. Unfortunately we can't do that for LLMs hence why it's still only suitable for prototyping.
No you can't, or at least I can't. LLMs are more work than just doing it by hand.