When otherwise reasonable people say they would pick and choose whether to comply, it reinforces the unreasonable people in their unwillingness.
When unreasonable measures are imposed, people resist the reasonable ones. I warned of that in April and here we are.
I am against stupidity, and mandated masks in uncrowded outdoor settings is stupid, and, ultimately, counterproductive. And I'm also against counterproductive measures.
If you impose mandates that are reasonable, you have a right to expect compliance. If you impose mandates that are unreasonable and unnecessary, you forfeit that right.