A mask keeps out droplets, not viruses. Also keeps them in.
Exactly. You can also point to the effectiveness of masks in other countries.
After about five minutes they get soggy and gross and you can barely breathe through them.
But as long as it satisfies your superstitions and makes you feel better because other people are obeying you, that’s all that matters.
And when “droplets” evaporate in a minute or two, where do you think the viruses go? Think hard...
To offer useful protection a mask has to be properly designed and fit. The usual homemade mask is far from the mark. One that is properly designed will be very uncomfortable for most people in the coming hot humid months. Certainly there is no valid reason for a healthy person going about their business in the great outdoors to wear one.
In situations where it is valid the mask should never be considered a stand alone method of infection control.