> This mostly solves hallucination
Current AI is like the film company producing TV series or movies
Your question is like a story outline. You tell the film company that this is the movie you want. The AI film company then searches for existing similar stories. If similar stories do not exist or details are missing, screenwriters use imagination to fill in the gaps (remember hallucination? It's just a makeup.)
So you cannot solve hallucination of AI
Indeed ! LLM are creative writers, not journalists. Relying on overfitting for factual accuracy in not tenable. I don't understand why grounded RAG with judges in not the norm.