I've been reading LeCun's posts and tweets, and I don't recall him saying, "LLMs ‘being just regurgitators’."

Could you please point us to the source?

He did say that they have "cat's intelligence," but that's a different thing.

Of course, the regurgitation assessment is wrong; I commented on this in my latest post, "3 Key Differences Between Human and Machine Intelligence You Need to Know."