The masks worn out in public areas are not for the wearer's protection, never were
Covid is mainly spread by an infected person after they have the virus 24 to 48 hours and before they have symptoms of having the virus IF........they ever do, some don't get symptoms
Symptoms often don't show up for 7 to 14 days AFTER exposure so that person can be spreading Covid to others for minimum 5 days but maximum 13 days
They spread it thru exhaling........or coughing and sneezing, sometimes thru shared surface contacts, but smaller percentage
This is why Covid spreads so fast and to so many
With a regular Flu virus you have symptoms within 12-24 hours and know you are sick, most people will avoid others at that time
With Covid you have no idea your body has been hijacked and you are now a walking talking Covid factory, pumping out viruses as fast as you can breath
That's what the 2 meter/6ft rule was/is all about, staying away from exhaled breath
Masks simply limit the distance somewhat, as said 1% limited is a 100 million billion times better than 0% limited
Its not how well a mask works, its whether it works at all, and it does work to limit distance of exhaled breath
Working brakes lights are not 100% effective, you can still get rear ended, lol, but they do limit the amount of times you might be rear ended, so IMO best to have working brake lights, but others may disagree
"If its not 100% effective, then screw it, not going to use it"