Difficult issue.........
I would assume, that most people would stop to give help at a RTA....but there are hidden dangers.
On one occasion I stopped to give assistance to a motor cyclist who looked in a spot of bother and was "manhandled" by a bystander who pushed me away saying "Get away, I am a First Aider".....I didn't argue.
The other problem is..."would you know what to do?" and would your intervention endanger the life of the victim? Easy to address a hypothetical accident, but a different ball game to address the real thing.
I never stop at accidents.
if you have a medical qualification then you are expected to give the standard of car expected of a person with appropriate qualifications and if it is believed that you have fallen short of this standard of care.......you can be sued in a court of Law.
Not easy....