In spite of taking the Oath of Hypocrates, no physician was forced to become a "helper". However, by their nature, they do work HARD and LONG - BUT with excellent financial compensation.

That said, the physician in question did go beyond the usual and it would be nice to get some recognition at least, or even something tangeable. A letter of request or complaint to the HR and CEO types would be pretty normal - especially when the FA or crew did not assist in the connection ...

OTOH, many folks go out of their way to help others and get absolutely NO recognition/reward. It sounds like that flight was one of those "Boy Scout/Girl Guide" days.