> ... [if] the bystander is interfering so egregiously with the EMTs that the extra second poses a plausible risk to the patient
Dude, you need to take a CPR class or something. Emergency response is HARD. If you're the EMT, you don't know if the patient has a ruptured soft organ, low blood pressure, or clotting problems, ICP, arrhythmia, etc etc etc. In five seconds they can go from lucid to passed out and then what seemed like a routine stop gets deadly serious and you're in trouble.
You need to work fast but you need to work ultra smart. One missed sign or wrong move could ruin a patient's life.
The whole time you're working you're trying to keep tons small bits of information in your head (ask about allergies, ask about illness, ask about prescriptions, ask about family history, any Battle's sign, how was cap reflow? Any heart problems? is the patient losing orientation? more neck soreness, did I miss a C-spine hairline? I need to move her shoulders but it might cripple her. if I could just get some friggin ROOM here. Can I ignore the bruise on the thigh? Did I hear wheezing? ... etc ).
Now do this when you have drunk people milling about, talking back to the police right over you.
My point, because you don't seem to get it: every accident scene is an urgent situation until the patient has been transported. Every interference is egregious. Every. last. one.
You seem to think that cops and EMTs have superhuman abilities to diagnose patients, psychoanalyze bystanders, and predict the future, all while while chatting amiably and stroking egos. It's bizarre.
(I did ski patrol for a few years so I got a taste of what EMTs do every day. I am in awe.)