So what? If they don't want to risk catching it or any other unpleasant respiratory illness why does it bother you and people like you so much? Is it some kind of macho thing where everyone should just accept that they'll probably be coughing their guts up several times a year because everyones in it together? They should just "man up" and catch it like everyone else? I'm genuinely curious.
#1 - Not wearing them properly is just virtue signalling
#2 - Masks are grubby
#3 - Regular handling of grubby masks and handling customers food items and coins and notes leads to further spreading of flu and other viruses
#4 - covid is a busted flush