Putting Chomsky aside, LLM do not seem to teach us much. Obviously, they are good at language processing and for just being trained on language they seem to appear surprisingly "smart". LLMs after training also have language built-in similar to what the human brain has after evolution, and this seems to confirm rather to contradict the idea of language being an important and fundamental part of the the human brain does. On the other hand, there is also a lot missing. But we already know that there are many other cognitive processes in the human brain which are not related to language, so it is not something we learned recently by analyzing deficiencies of LLMs.
If you believe in esoteric stuff such as "qualia", then LLMs also tell you nothing. You can continue to believe that true experience requires a human brain and all that a computer does is imitation. But this has no observable consequences that can be used to falsify these ideas, so is not a scientific concept in the first place.