It seems clear enough to me, yet no one is publicly promoting this concept. They are cheap as dirt to manufacture and there is no reason they shouldn't be readily available to the masses by now. You simply are not well protected with anything less.
The other masks most are wearing do not protect you well from the virus. Why wouldn't you want to protect others AND YOURSELF well??? If you get it, then you become a threat to others, so any way you look at it the masks most everyone is wearing now are a poor option.