A problem here is that I would have so little confidence in this thing that I would have to carry all of my more trusted stuff anyway. So, ironically, this thing becomes unnecessary weight, instead of saved weight.

A lot of that stuff he's doing would be difficult even in ideal conditions. Forget about that whistle for a real emergency where I'm tired, weak, and desperate, and it requires two hands. My real whistle is louder, requires zero hands, requires less breath, and is plastic. The tinder prepping he's doing with that tiny blade, I can forget about that too. I'm just not that skilled. I have difficulty getting my charcoal grill going in my comfortable backyard if it's too wind outside. I know my limitations.