In my experience people vastly overestimate the competence of doctors. Getting medical advice from LLMs could be life saving.
Personally I experienced this when a specialized doctor believed a drug interaction to be the opposite, thinking A hinders the absorption of B, when actually it hinders the clearance, tripling concentration of B.
Without AI, I would have been clueless about this and could not have spotted the mistake. I don't know if it would truly have been critical, but it did shake my confidence in doctors.