Unfortuneatly I've come across 6 river fatalities over the years. And, in my experience, most if not all, may have been avoided - human errors.
Whitewater derserve every possible bit of respect and I think waders, although not "proven mechanisms" of death are not a wise choice of gear.
Anything that may hinder an ability to self-resue should be seriously examined.
But yes, I agree to disagree.
RE: the scenario I first mentioned. I was the first responder, am familiar with the events leading up to...but cannot speak to them being fact.
Boat safely!