On the one hand, there are SO many reasons using LLMs to help people make health decisions should be an utterly terrible idea, to the point of immorality:
- They hallucinate
- They can't do mathematical calculations
- They're incredibly good at being convincing, no matter what junk they are outputting
And yet, despite being very aware of these limitations, I've already found myself using them for medical advice (for pets so far, not yet for humans). And the advice I got seemed useful, and helped kick off additional research and useful conversations with veterinary staff.
Plenty of people have very limited access to useful medical advice.
There are plenty of medical topics which people find embarrassing, and would prefer to - at least initially - talk to a chatbot than to their own doctor.
Do the benefits outweight the risks? As with pretty much every ethical question involving LLMs, there are no obviously correct answers here.