That ChatGPT is capable of producing human-like sentences from pattern recognition without any universal grammar baked in
You didn't address or missed the main point: chatgpt requires something in the order of a trillion tokens to be capable of producing what you mentioned in one language.
There are 40 months old babies that are fairly conversant in both Chinese and English, and are able to detect sarcasm with something like 0.0000001% of the tokens, doesn't that give you pause that part of language acquisition is innate to humans and is not entirely acquired the way chatgpt is taught?