I’m very surprised no one has mentioned the good samaritan law.
I believe this originated in the States.
Also surprised that it seems to be the pilot who decides whether to divert a flight and not a Dr dealing with a patient.
I work in remote locations and it is always the Dr or Medic on site who decides when to evacuate a patient, never the pilots.
Sounds like some posters on here are looking for an excuse not to help which I find very sad.