The US is incredibly lawsuit-heavy. You can't even just go and explain your side of the story because the victim will bring the biggest, baddest ambulance chaser they can find.

Not all states apply good samarintan clauses the same, some only apply to civil liability which gets messy.

The Hippocratic oath would be enough for most to do it anyway if no one steps up, but i understand the not wanting to part because they are not universally protected.

It is worth it to a doctor to throw away their career and life savings to find out?