You want to wear a mask then wear one. If you are scared of those who don't then stay home. You do what you do and I'll will do what I do. I'm not wearing a mask no matter who tells me. Keep your distance and stop trying to take my rights. It's not my fault you have bought into the bullshit.What is sad is the customer arguing with the clerk about the mask requirement in the first place. The low paid clerk does not make the rules.
The store is a private business and the customer has to abide by their rules. If not, gtfo.
For those with medical conditions, they can get an exempt letter from their physician.
Otherwise it is no harder to wear a mask than it is to buckle your seatbelt. I am 75 with four heart stents, 90 lbs overweight, and bad knees. I have no problems with wearing a mask if required.