For this whole discussion, it actually really does matter if GPT-4 is able to reason or not. That is the essence of the discussion. It's not whether or not it looks like it can reason.
My own car includes cameras and can keep me from disaster by applying brakes and correcting steering, but it makes no claims whatsoever to be self-driving.
A Tesla car unfortunately looks like self-driving, walks like self-driving, and quacks like self-driving, but it turns it does matter how much the nitty-gritty details prove the thing is absolutely not actually self-driving, in that encounters with things outside of its training model seem to result in collision or decapitations.
It is the trust people place in their cars that results in disaster when they reach the edge of what the cars can handle. They aren't ready to take over the controls and understand their current situation in a fraction of a second.
Placing too much trust in LLMs could have the same effect. I've run into several situations where I asked Chat-GPT technical questions and it confidently gave me detailed answers that clearly represented absolute failure. Fortunately, I don't trust it blindly, or at all, so I wasn't fooled.
I'd prefer an LLM more like my current car, that didn't try to do too much, but that's just not in the nature of how they operate, so instead we're all one emergency vehicle parked across the street away from a terrible accident.
ChatGPT is an implementation of the Chinese Room Thought Experiment.[0] Our pareidolia allows us to ascribe reasoning faculty.[1] But it is far from proven.
[0] https://en.wikipedia.org/wiki/Chinese_room
[1] https://en.wikipedia.org/wiki/Pareidolia