He was onto something with the doctor thing.
1) Things that help people make money are 100x more valuable, i.e. something that helps the Docs generate more revenue.
2) This was insulting: "So I’d sorta just be, like, donating this money if I paid you for this thing, right"
Seriously a professional talking about a 'donation' if it didn't actually increase her revenue? What a jerk. "I care about my patients but in the end I just give them Zoloft!" I mean that might say a lot about that line of work.
That said, I think they might actually use it, if it's institutionalized - i.e. they use it Med School, doctors everywhere use it, two doctors 'unsure' about something both check it etc. it becomes 'something needed' at the office and everyone is expected to have it.
I suspect there's opportunity there, it's just take some time and structuring.