Then you're responding to the wrong guy. Or you're not the same AC. Because I saw someone say, "Hey I'm not against masks. I have looked for something to back up your assertion but found nothing please help me out." The response was, "I won't waste my time because you're not going to listen." The only evidence for that is in your head, because that post held nothing but willingness to learn.
I'm not against wearing masks. I wear one when I know I won't be able to maintain distance. And I encourage others to do so as well. And I have not seen evidence to back up that claim. Assuming you're the same AC, please let me know where I can find such evidence. I have seen evidence that it will noticeably lower the infection rate, but not that it will dramatically.... And there I see that this discussion is doomed because "dramatically" is meaningless, even if there weren't Anonymous Cowards invovled.