- An LLM has more knowledge, but it doesn't have information about what you specifically want to convey. Anything you give to the LLM may be good information. Anything the LLM adds is not additional real information, because whatever it adds can be inferred based on whatever you wrote. Or the LLM adds additional information that can't be inferred based on what you wrote, which is even worse because that's basically just misinformation.

- If you're giving additional prompts to the LLM to refine its output, then you're the one adding real information, not the LLM. The LLM is just rephrasing the information and adding noise.