If masks have any relevance it is contextual, not general, not universal.
Wearing a mask while driving the car, casually walking down the street, even with friends or family, working in your yard and many other things where your only contact with someone may be random and fleeting has zero relevance at all. And if you are outside and standing in a line six feet away from anyone else, the mask is also then not relevant beyond a fashion statement that is meant to say “see, I’m a good person, I’m wearing a mask”.
Infection is not obtained by random fleeting contact with someone, particularly not someone who is not exhibiting any illness symptoms. Infection is made in closed quarters with some period of sustained contact with someone who is infected, someone who is infected and in spite of that and knowing that does not keep themselves masked to help protect others. As far as is known now, asymptomatic persons do not exhibit a viral load, or symptom activity that is going to expel a viral load, sufficient to cause an infection for someone else and most importantly not when contact is not in closed quarters and/or sustained contact for some period of time.
That knowledge can be applied to all activities, to see where the context meets the need for a mask, or not. Universal one rule fits all occasions are intentionally not rational, because their goal is that no one should think, just be a rule follower.
It all makes sense if you consider that they do not believe we can think. Let's close the beaches because a some people can not think to stay out of each others faces.