Yes, let's all sit back and do nothing if someone is in distress because it may result in being sued or arrested by police. *notes sarcasm
The hypothetical situation presented was someone dies if no action is taken. When it is obvious someone will die if no action is taken, there is a moral duty of a bystander to take what action they can to save that person if there is no certain danger to the bystander, regardless of whether the person is trained or skilled in that action.
Using Sammy's logic, imagine a scenario where someone is hiking and comes across a hunter being mauled by a wild dog and sees his gun near them. Because they are untrained in the use of firearms they should not pickup and use the gun to save the hunter.
Using Sammy's logic again, imagine 2 people in a factory, one is pinned by a forklift and is bleeding profusely and will die in 10 mins unless the forklift is moved. There is no-one else in the factory within 30 minutes of the pair of workers. The unpinned worker does not have a forklift licence. By Sammy's logic because the worker is not trained, he must watch his fellow worker die.
There are countless other scenarios where attempting to save someone takes precedence over the lack of skill or training of the bystander.
It really really annoys me when people use the excuse "but I have no training" therefore I do not have to do anything.
I recently suffered an injury on a footpath next to a busy a road. I was visibly hurt and no-one stopped to render assistance. Why did no-one stop? I don't know and can only guess. They were too busy, they thought someone else would stop, they just didn't care ....
While my injury was not life threatening, it showed as a a society we are losing our way and attitudes like "I am not trained" are just another excuse to avoid the need to help someone in distress.
Sammy, in my opinion, you are VERY VERY WRONG.