The notice on the door of my local deli accurately, but probably unintentionally, sums up the way things are with wearing masks, the gist of it is this -
If you are queuing at the counter to be food to take out, you need to wear a mask, if you are queuing to buy food to eat in, you don't need to wear a mask, if you are not wearing a mask, we will assume that you are exempt for medical reasons and we will not challenge you.
Extrapolate that sort of thinking across the nation and the futility of trying to enforce mask-wearing is writ large.
It's a virus - you either commit to stringent measures to ensure its minimal spread, and enforce them, or you simply do nothing and let nature take its course.
Right now we have the worst of both worlds - confusing unenforced rules and a virus unable to spread, find its level, peak, and be assimilated like so many other viruses are, and have been.
The world needs to make up its mind - preferably sooner rather than later.