T. A. Gardner
Serial Thread Killer
That is a laboratory experiment. It doesn't equate to effectiveness in the field. For example, if the mask someone has on is poor fitting, like this one,Check out this video from this search, comparing masks covid https://share.google/dma4isGRzxG4wJHPw
Even if you're correct, they didn't know that. Still not un-American to care about their health.

That is all but worthless.