I agree, Carl. I mentioned quicklot because It had been described as a “miracle bandage’ elsewhere and I figured someone here would know about it.. The type of implements in folks’ kits mentioned above got me pretty nervous, like that old tv ad where the surgeon is giving directions to the guy on the other end of the phone who is holding a scalpel on where to cut to take out his own appendix. I’ll bet sewing up a family member’s wound with sutures might be the max you could hope for with any degree of success, assuming you could manage infection.
I know that in WW2 a Bosun’s Mate on a sub took out some guy’s appendix with a sharpened kitchen knife and some whisky but these are battlefield heroics. Only a small percentage of folks, as you suggest, would survive severe trauma without skilled intervention. A general surgeon I chatted with at the Rowe conference in 2008 said one simple thing she couldn’t imagine doing surgery without was suction.