Yeap, it's all about getting the odds right.
Helmets in roughstock rodeo is much the same way as far as acceptance. Those that ride with them lower their chances of injury, many still choose not to.
I sled with a tekvest and knee guards. Just doing what I can to keep myself on the mountain weekend after weekend, pain-free riding, and able to show up at work in the morning.
If $ were no object, i'd have an avy pack on my back. Once they gain acceptance, a few more manufacturers in the game, and price goes down, I suspect they'll be about as popular as vests are today.