The premise you may be missing is that it’s a necessary thing to teach. It could be that common sense works in a supermajority of cases. If it was a car accident, it’s likely an ambulance will be coming anyways. If they just have a cut finger, you disinfect, bandage and you’re done—no need to pass them off. The edge cases where somebody makes a wrong call are probably pretty rare, all things considered.
The premise you may be missing is that it’s a necessary thing to teach. It could be that common sense works in a supermajority of cases. If it was a car accident, it’s likely an ambulance will be coming anyways. If they just have a cut finger, you disinfect, bandage and you’re done—no need to pass them off. The edge cases where somebody makes a wrong call are probably pretty rare, all things considered.