Earlier quoted context omitted.
I don't know how you compare, but ChatGPT's English grammar and vocabulary are significantly better than mine. And when I prompt it appropriately, it also seems to be a better creative writer than I am, at least for short pieces.
Except it has no freaking idea what it's doing, that's the difference.
(This is why I believe LLM performance is best judged against human inner voice/system 1 reasoning, not the entirety of human thinking. When thinking with system 1, people don't really have an idea what they're doing either - they're just doing stuff that feels right.)
Also note that "sounds right to a human" is literally the loss function on which LLMs are trained, so between heaps of training inputs and subsequent extensive RLHF, the process is by its very construction aiming optimizing for above-human-average performance across the board.