Personally I have no problem with people carrying lots and lots and lots of gear with them as long as they know how to use it. Treatment of traumatic injuries is simple and doesnt really involve advanced training as long as you follow the rules. What serious trauma needs is hosp not field treatment (only field stabilization). Remember that all bleeding eventualy stops on its own. My typical lecture on soft tissue injuries and bleeding takes about 2 hrs. Splinting is another 2 hrs. If you want to carry all that stuff with ya go ahead as long as you know how to use it.

Personally I evaluate my day and what Im going to be doing that day. I go hiking I may take bigger FAK with me. I go to the range I may throw a bag with some fluids and maybe few extra occlusive dressings. I go diving and I will take my O2 tank. But if I'm hanging out around city or just running around basic small FAK is sufficient. You guys know me and I used to carry a small field hosp with me and many many other stuff. Not anymore. I'm new and improved streamline model with carries basic minimum.