“If they don’t work”
They ONLY work if of the right type and are donned and doffed properly.
The general public is showing their lack of education or intelligence considering what they wear, how they wear it, and how they don and doff the thing.
But, it makes people feel good about themselves and others who wear such useless instruments. Magical Masks™.
“They ONLY work if of the right type and are donned and doffed properly.”
If you have a mask on at least you are not spraying droplets all over other people. That seems worth doing.