Folks should be wearing masks when they are or even might be sick with ANY transmissible disease. Its actually pretty insane that pre-covid, folks would go into public and work while endangering who knows how many people (I know a lot of people don't have the option, which is a whole other bag of worms).
I find it extremely depressing that people compare this to other easily preventable deaths (I see it often online and from my own family) and say: "See we handle the seasonal flu pretty horribly, why are we trying so hard with COVID-19?"