So let's start with an easy question...
Why do we wear masks?
To keep ourselves safe and not get sick from others.
To keep others from getting sick from something we may have.
Now please notice I did not allow for the answer of "both," I want people to look at it from one or the other and give their opinion or thoughts.
Now on to the next question...
Do you believe this is effective?
Yes I believe this makes sense and does work.
No I do not believe this makes sense nor does it work.
I have no idea, I'm just doing what I'm told.
Now, don't go trying to change your answers, let's just move forward.