I thought this same thing up until about a week ago. Can you post sources of studies that show that the bolded part is true? There seems to be a lack of evidence for this line of thinking and is exactly why the Surgeon General was initially saying masks do not work. I thought he was incorrect at first but it appears the guy actually knows what he's talking about.
Here is a link to an article that talks about some current research. The conclusions are that masks really don't do much of anything.
https://www.google.com/amp/s/www.li...ks-effective-reducing-coronavirus-spread.html