Totally agree, it can be a bit of an echo chamber. I had an infection post-dental-work. Bing Chat insisted I had swollen lymph nodes from a cold that would resolve on their own, then decided I had a salivary gland infection. After a follow-up with a real-world ENT, it was (probably accurately) diagnosed as a soft-tissue infection that had completely resolved on two rounds of antibiotics. The AI never raised that possibility, whereas the ENT and dentist examined me and reached that conclusion immediately.

I do think AI is great for discussing some health things (like "how should I interpret this report or test result?"), but it's too echo chamber-y and suggestion-prone for accurate diagnosis right now.