My opinion on this FWIW--there is obviously a dearth of good studies on this topic because this is a brand new problem. So, challenging the study is reasonable. There is nothing conclusive in JAMA or NEJM or any other journals and if there are, please post them.
But IRL, I see NOTHING wrong with adopting a reasonable practice like trying to keep your "stuff" out of other people's faces and vice versa.
It's uncomfortable? You can't see me smile at you? You can't breathe easily through it for a short period of time? Poor baby. Life is tough. Again, I go back to times when people had REAL sacrifice, like living in an an attic annex for 2 years with 8 other people, or taking jobs in factories to hold places for servicemen overseas.
Wearing masks is not a REAL sacrifice, IMHO, and the "why not" is so much bigger than the "why."