Those who've put those comments up can simply say they're exempt and walk into store, rather than give their real reason for not wearing masks as they know they'll then be denied entry...
Has it occurred to you, that those reasons are also very good ones?
If you feel that a very harmful cultural norm is being enforced without good reason, it's your duty to resist. I most people just don't understand this - because either they're in the stupid camp who think that the mask mandate is a proportionate and effective measure, or because they just don't find wearing a mask difficult or a huge imposition, and cannot empathise with those who do (doubly the case if they're the stupid type who believes that masks do much).
People would have to have it put into a context where they would be distressed physically, mentally or ethically, to really understand what's going on.
Let's say that the next thing they mandate is shaved heads for everyone, because the virus can cling to hair and then be wafted onto others. I'm pretty sure that if the right person in authority said it (but even admitted that there was scant evidence), and there was enough social pressure to do it and fines for none compliance, that a large number of people would go for this, shave their heads and call others selfish for not doing so ' It's only hair! People are dying! STOP BEING SO VAIN!'. Many more would see this as a huge personal affront, and protest it - as they rightly should.
Or, say the government mandated a drill run for everyone, once a day, unless exempt. They're organised locally and attendance registers are taken. How many of you would be ok with that one....?
(Funnily enough, enforced fitness programs would probably make way more difference to the death rates than mask mandates, since obesity is a main co-morbidity).