So, you assert your right to choose for yourself.
Yet, you are fine for others to choose “the mask” for you.
No. A mask is a courtesy, that costs nothing and has no real side effects and might slow the spread of this and other infections. Again, it is a free country - private business can do what they want. Do you have a mask allergy or something? You are fine with spraying droplets all over people trying to buy food?