I wouldn't put much weight in this study, but I think a lot of us can still attest to the usefulness of LLMs in self-diagnostics. The reality in the US is that it is difficult to get the attention and care of a doctor so we're left having to do it ourselves. 10 years ago you'd hear docs complaining about patients coming in with things they found on google but now I don't think there's an alternative.

Case in point, I went to a podiatrist for foot and ankle issues. He diagnosed my foot issues from the xray but just shrugged his shoulders for the ankle issues and said the xray didn't show anything. My 15 minute allocation of his attention expired and I left without a clue as to the issue or what corrective actions to take. 5 minutes with an LLM and I had a plausible reason for the ankle issues which aligned with the diagnosis in my foot.