I didn't say we always have to make rapid life/death decisions. We are, however, trained to do so should the need arise.
Case in point, and only a possible example, most RN's aren't trained in how to extricate a patient in an MVC. If not done right, further harm can be caused to the patient. We have to know how to get the pt. properly extricated, packaged, stabilized, and transported. Like I said, only an example.
I can, however, provide another example. At a local ER a pt. arrived POV c/o pain in his leg/thigh, he was placed in the car by a friend, was unable to ambulate, and in pain. The only Medic working in the ED that day was the one who told me about this. He and several RN's went out to the car to assist the pt. Upon making pt. contact it was discovered the pt. had classic shortening and rotation of his LLE, pointing to a?? Yep...fx. femur. The Medic had to locate a Traction splint, and then teach the RN's how to apply it and get the pt. in the ER without causing further harm. I'm not knocking the RN staff, but none of them knew how to do this, and could only assist the Medic as he did the job.
The practice of Medicine is a Team concept, far too many have forgotten this.