I believe that collectively we passed that point long before the onset of LLMs. I have a feeling that throughout the human history vast amounts of people ware happy to outsource their thinking and even pay to do so. We just used to call those arrangements religions.
That’s a bit cynical. Religion is more like a technology. It was continuously invented to solve problems and increase capacity. Newer religions superseded older and survived based on productive and coercive supremacy.
Religions may outsource opinions on morality, but no one went to their spiritual leader to ask about the Pythagorean theorem or the population of Zimbabwe.