@cooperplace
That is norm almost all the time, at best they have access to run credit card purchases, there is no way to actually validate so called Doctor's ID. Folks are making up rules to justify the behavior.
Grannies with rolling pins doesn't fit the mold of a normal flight attendant, but we accepted that as a fact even though fans and marketing agencies of every other airline making fun of us. So it is inappropriate for an FA to judge an young black female on her qualifications.
About liability, what would have happened patient dies because FA blocked services offered by medical professional because she didn't like the looks. Airline will pay heavily.