You've got it all wrong, and LLMs have it all correct.
True brains, after 16hrs of actual work, need to hallucinate strongly for 8 hours or so, in order to continue their high level contributions to society.
Interesting. What if that is actually a beneficial part of our own development: comparing the nonsense in our dreams to waking life and building the ability to tell the difference?
Get an LLM to dream, and to use the time effectively to purge those hallucinations, and reinforce the "valid and true" memories, and you might have something there ?