That part made the least sense for me. Since a more advanced version of a LLM would be better at extracting the truth of things from the given data, what could

That part made the least sense for me. Since a more advanced version of a LLM would be better at extracting the truth of things from the given data, what could it possibly gain from ingesting the output of a less precise version of itself? It couldn't ever add anything useful, almost by definition.