This definitely sounds impressive, but could it be that you "learned" how to describe the symptoms over time in a way that makes it easier to arrive at the correct diagnosis?
It could also be that knowing the correct diagnosis changes your description to highlight things in a way that suggests the correct outcome. I believe doctors are also susceptible to that effect.
I'm not trying to imply that doctors should not do a better job diagnosing. People should not have to "learn" to find the right doctor, or how to operate them. It's a crying shame that people like you have to go on years-long journeys to get correct help, and I'm sorry that you and your wife had to go through that.
Just saying it might be slightly more apples-to-apples to compare ChatGPT's performance to the last couple of physicians you saw, and not the whole lot of them. But again, that's still a very favorable comparison for the non-human.
Ten to fifteen years of doctors, over half a dozen, failed to accurately diagnose her until this month.
ChatGPT got her diagnosis right in a second. Wow. I'm both amazed and angry that we could not get this diagnosed a decade ago.