Rather succinct analysis.
As a mediocre intellect is, by it's very nature, incapable of recognizing the existence of anything higher then itself, this will always be a problem.
CHF anon here, did a test at my clinic. Started at 98% blood oxygen (worked for years to get there), and within 1/2 hour with a mask, I registered 3 readings under 70%. Organ damage begins at around 80, for most.
Going to take another anon's suggestion, and stiffen my mask with tape inside, to allow free flow underneath. No mask, no care. Not gonna die to serve a macho purpose, or to instigate redpillling normies.
Both. Long before 80, I start to pant. Can't stop that… too much like the week I was supposed to die.