This is not a wrong sentiment. I'd be super interested in hearing an analysis of its CoT. To my ears it was a nearly schizophrenic roundabout with a lot of contextual things like "that's high" but I don't know why it thinks that.
What I think is incredible about this example is how adept it is at mixing precise calculations with rough heuristics. That's exactly what I was taught, to validate the numbers by asking "Does this answer seem reasonable?"
ChatGPT doesn't do that at all, as far as I'm aware