An interesting analogy.
Though what I have read point two is a fallacy. If you are wearing trousers and I piss on them then they may protect a little bit until such time as you go to take them off and you get piss on your hands and then on your legs.
Or in the case of virus you take your mask off when you come home, don’t do it properly then touch your face with your grubby hands.
But again main point is the purpose of the mask is to protect others from you not you from others. To protect you from others you would need a full face shield which is what you see medical staff in high risk locations wearing etc.