Sorry but that advice leads to unnecessary death or life changing injury. Standing by while an unconscious person in the car dies from positional asphyxiation when all you had to do was lift their chin up? Or someone's bleeding out from a leg trapped under the dash?After years in the army, further education, transport and logistics, security, and vehicle recovery, all you need is a phone and an accurate knowledge of where you are. Then leave it to professionals who are, allegedly, trained and equipped to do the job.
In your example you've abandoned your car, on a motorway, to help somebody else. Admirable, but causes as many problems as it solves.
First rule of first aid, don't become a casualty yourself.
These will kill the cas before the professionals turn up.
Even the most basic first aid training with no kit is preferable to just driving by.