When H5N1 avian influenza started spreading among dairy cattle across the U.S. this year, regulators warned against consuming unpasteurized milk. What happened? Raw milk sales went up.
Distributors of this unsafe-for-human-consumption product deny H5N1—which has the potential to sicken millions of people—is a danger. Dairy farmers decline to allow disease detectives onto their properties.
This literally says exactly what I just did. Wearing a mask will not protect you from getting covid or any other disease but it can protect other people from catching it from you by stopping you from spreading it.
P.S. and yes, at the time healthcare professionals needed the masks desperately so that they could administer to patients without the fear of spreading the disease all over the place if they caught it because COVID has such a long incubation period that overlaps significantly with its shedding phase.