I guess that's one way of doing it Terry but there are more less invasive ways of checking if someone's breathing that can be done just as quick. I don't know about others but my first aid kit isn't filled with useless crap as you might suggest, and I carry nothing with me that's strictly for fighting infection. I'll give you a brief run down of some of the items I carry...........rubber gloves, for my own protection, and I'm sure I don't need to tell you against what, a resuscitation mask to enable me to give mouth to mouth without fear of infection, sterile solution (saline) that can be used for flushing eyes, etc, shears for cutting away clothing, foil blanket, sterile non adhesive dressings for burns, plus all the usual dressings that can be used for minor and major trauma, including triangular bandages, scissors, and even safety pins.............some of these items are not life saving, but useful nevertheless. I also carry within my kit sterile wipes, tape to secure dressings, etc. thermometer, tweezers, and even a pad and pencil.............as I said, not life saving, but useful.
Your view seems to be more about only controlling blood flow, where as mine is more to giving aid in whatever way I can.
Not knocking you mate..............just a different point of view!!
I concede their is more to First Aide training??????? but First Aide Training to what extent???????? When I did the military thing I was trained how to push stuff back in when it came out, how to try and stop bleeding, how to strap exposed bone, jab a syringe in the side of the neck but all this was to try and keep the person alive untill the ones who had all the knowledge of what was next came forth.
All I know is this. If you try and stop the blood coming out things can only get better. Most of the crap thats in so called First Aide bags is to try and stop infection????? Ahhhhhhhhhhhhh but if the bloods still running out stopping infection is the last thing you should worry about.
So pack a few stretch bandages, cause they work 
And you are quite right ST2UP But if I found someone unconcious on the side of the road the first thing I would do is to jab 2 fingers down their throat to see if they were still alive. If their alive they will gag. Yeah I know they havent taught that in any First Aide classes I have went to, but it works especially when you are dealing with a suspected heart attack victum. If they don't Gag their not breathing.