Less of your hot breath and fewer of your hot germs reach your neighbor. This reduces r0, in theory.
Only in some stupid and well-paid "theory". In theory that span only on tiny part of whole process and does not account tons of additional factors that involved in whole process. It's like having a thorougly paid theory that stones definitely could levitate based on tiny part of throwing stones process. "Hey, look, at that milliseconds that stone definitely don't change its height in clear air without any support! You see? Stones could levitate!"
What happen after a droplet with pathogen stick to mask fabric fiber? What happen when that droplet continuously blow in and out during breathing? What happen when pathogens released from masks of others and traveling with dust or fog stick to the wet fibers of mask fabric? What happens if human instead of venting down all pathogens, it already get rid of, will breath good part of them back? How many bacteria will eventually stick to wet mask fibers and what will be their grow rate in that warm and wet bacteria paradise? Why you concerned about CO2 concentration which is not very important for humans that breath out 40000ppm, 100 times more than in atmosphere, but completely omit oxygen deprivation (even 1.5% lower level is already at minimum allowed level - 19,5%, at least by Russian stadards) humans very sensitive to?
And so on.
Your point about restricted natural microbiota is not valid too - that microbiota perfectly stick to wet mask and finally find its way into human body, possibly in highly increased amount due to perfect for grow conditions.
Wearing masks "to protect others" in crowded places is literally like licking your own pee from the dirty bar toilet floor.
Masks can't work as was lied to public by coronahoax perpetrators. Not even in theory. The only purpose of surgical mask is to keep the surgeon's spit and snot from accidental falling into open incision during surgery and that's all. There can't be any other purpose of surgical mask.
Only in some stupid and well-paid "theory". In theory that span only on tiny part of whole process and does not account tons of additional factors that involved in whole process. It's like having a thorougly paid theory that stones definitely could levitate based on tiny part of throwing stones process. "Hey, look, at that milliseconds that stone definitely don't change its height in clear air without any support! You see? Stones could levitate!"
What happen after a droplet with pathogen stick to mask fabric fiber? What happen when that droplet continuously blow in and out during breathing? What happen when pathogens released from masks of others and traveling with dust or fog stick to the wet fibers of mask fabric? What happens if human instead of venting down all pathogens, it already get rid of, will breath good part of them back? How many bacteria will eventually stick to wet mask fibers and what will be their grow rate in that warm and wet bacteria paradise? Why you concerned about CO2 concentration which is not very important for humans that breath out 40000ppm, 100 times more than in atmosphere, but completely omit oxygen deprivation (even 1.5% lower level is already at minimum allowed level - 19,5%, at least by Russian stadards) humans very sensitive to?
And so on.
Your point about restricted natural microbiota is not valid too - that microbiota perfectly stick to wet mask and finally find its way into human body, possibly in highly increased amount due to perfect for grow conditions.
Wearing masks "to protect others" in crowded places is literally like licking your own pee from the dirty bar toilet floor.
Masks can't work as was lied to public by coronahoax perpetrators. Not even in theory. The only purpose of surgical mask is to keep the surgeon's spit and snot from accidental falling into open incision during surgery and that's all. There can't be any other purpose of surgical mask.