Which is exactly what your wearing a mask is.
Your wearing one will not keep anyone from catching anything. But it makes you feel like you are doing something.
It is like the signs "Whatever area" STRONG. Does exactly nothing but it makes the sign maker feel like they are doing something.
Do what you want but know that it is useless and unless you are taking steps to keep your mask sterile you might even be making yourself or others sick.
Why do you think that they are encouraging people to use disposable shopping bags again?
It’s reasonable to believe that coughing while being sick will spread a virus all over the place. It’s why people in Asia often wear masks as part of daily protocol.
Why do doctors, dentists, nurses, etc. wear masks? To say that they don’t work, as a blanket statement, is just untrue.