I think the truth lies somewhere between these two extremes. An LLM is not a human brain, and does not try to emulate one. It should not be a surprise that an LLM does not behave like a human brain. So we can not infer things either way. The best we can say is that an LLM appears to exhibit very similar behavior to a human brain, under certain constraints. So maybe we can infer that the human brain has something in it that operates in a similar way to an LLM (like the human "unconscious", or "intuition" maybe). It seems obvious to me that a human brain and an LLM are not comparable things, for many reasons. So we can not make inferrences one way or the other.