> With learning, aren’t you exposed to the same risks? Such that if there was a typical blind spot for the LLM, it would show up in the learning assistance and in the development assistance, thus canceling out (i.e unknown unknowns)?

I don't think that's how things work. In learning tasks, LLMs are sparring partners. You present them with scenarios, and they output a response. Sometimes they hallucinate completely, but they can also update their context to reflect new information. Their output matches what you input.