@5qfy,
“If you're wearing your mask and someone farts, do you smell it?”
This is the false setup. Yes you smell it, because it’s a gas.
“If so, how do you think it's going to stop an aerosolized virus?”
With a filter. As tight as mesh as possible, preferably forced air through a dense filter. However, this is not practical because there aren’t 350M sitting on a shelf.
A cloth mask is such a filter. The mesh size is larger than the virus, but the aerosol droplets carrying the virus are what you try to stop. Those droplets are much easier to trap. Probabilistically, as the droplet travels in a straight line, it’s gonna bump into a fabric thread at some point. It can’t go straight through the mask for the same reason you can’t casually see through it - there’s paths through the cloth, but not many in a straight line. The goal here is to CUT DOWN THE PROBABILITY OF TRANSMISSION. Having a barrier that impacts exhale, even if it’s only 20% effective, reduces the probability of every following event that leads to a death. Kinda like compound interest, that little impact early scales into sizable transmission.
“If someone's coughing or sneezing, sure, it will stop respiratory droplets. “
Bingo, that’s what it’s for. Unless you fa-t corona virus and don’t wear clothes in public…
“If someone is healthy or asystematic, the mask does nothing but impair respiration. “
By definition, if someone is healthy, they’re not spreading corona. My guess is that person would prefer that OTHER people didn’t pump virus into the air, which a mask helps curb. If that person is asymptotic, they CAN spread it and the mask can reduce the contaminated aerosol droplet at the source (per your statement above) (remember we’re talking probabilities, not absolutes). If a simple mask causes someone respiratory issues, they have some underlying health issue and aren’t part of the bulk of the population in the center sigmas.
The rest of your post was inflammatory emotion and hence rejected further reply.