This is the whole problem in a nutshell.
Wearing a mask isnt for you. Its to help protect everyone you come into contact with.
I used to see Asia tourists in foreign airports wearing masks years ago, and I thought it was a bit arrogant and almost like saying "this country is foul and we might catch something" Then a friend from Japan explained that the opposites was in fact the case, and people wear masks if they are feeling unwell in order to stop them spreading it to other people. Man, did I feel like a tool.
Wearing a mask is the easiest and most unselfish thing a person can do. If you dont wear one, you are an ar$ehole, pure and simple. (and dont start with the medical exemption BS. if you have respiratory issues which prevent you wearing a mask then stay the fook at home during a pandemic)
Its amazing the number of 30 something builders and perma tanned botox lipped lasses who seem to have developed medical issues preventing them wearing a mask.