It has nothing to do with sense and only to do with feelings on all sides. I also mask because I have elderly family and I care that they will die if they get sick at this point, I’m doing my part to minimize the impact on others with what is essentially a zero cost effort. It’s literally the least one can do, next to washing their hands thoroughly, and covering the mouth when coughing or sneezing. That last one is something many people still don’t do, so I’d be happy with a social expectation of fully covering one’s face when expelling saliva and mucus.