I am also just short of 63 and have trouble breathing through a mask, though not as much as llworking. I am very lucky that my employer is allowing me to work from home as long as is necessary before I can return safely - not just me, but everyone, and with the understanding that "safely" can mean different things for different people. But I still will not leave my own front yard without one. Safety is everyone's responsibility.
But there are some selfish people who don't care about the risks they are taking or that they are forcing other people to take against their will. They're more concerned with their "rights" than about the spread of a potentially lethal disease. With a two week incubation period, you can't possibly know whether you are or are not infected on any given day, but their position is that it's everyone else's responsibility to protect themselves and not their responsibility to take any means to prevent infection. "It's all about ME!" they cry. "If I don't want to wear a mask I shouldn't have to! If you don't want me to infect you, you should stay inside - why should I have to suffer with the mild inconvenience of wearing a mask or social distancing just so that you don't get sick with a disease that could potentially kill you? After all, my individual rights are far more important than the collective rights of society as a whole!" Or worse, "It's not really all that bad! We don't do all this for the flu!"
Well, the people who think that way don't know how to read the numbers, quite frankly. And if they would like to hear about just how bad this illness is I can put them in touch with someone to talk to who's had it. This is not Star Trek and needs of the one do not outweigh the needs of the many.