I did think about it.
Did you think about the fact that the micron gap, even for an N95 mask, is like as someone said here, putting up a chain link fence to stop mosquitoes?
They claim they stop droplets. But droplets just re-evaporate and let the viruses loose again.
AND (said this before) EVEN IF masks "stopped" viruses - which they don't - the viruses STILL just bypass around the mask AND/OR go straight to the eyes.
Masks are not biohazard suits.
Asthma DOES affect people in masks. Trust me, friend of mine has it. I don't even have it, and I STILL have to take it off and gasp for air if I'm doing heavy lifting at work.
Air is 21% oxygen. 19.5% in a workplace is illegal. You can see people testing with alarm devices under masks going off. That has not been "busted", that's just basic physics.
Defenses executed on all counts.
THAT is why exemptions exist.
And THAT is why it is not a threat to anyone.
I trust that answers your points.