This feels like such an American solution. If everyone just does this one magic thing then life will continue on as usual. First it was hydroxychloroquine, then a lock-down and now masks.
Masks worn correctly limits spread, but it's just a piece in the puzzle of tools available, and almost certainly not the most significant one, that is not meeting people.
Look at Finland, Norway and Denmark, they all successfully controlled it so far without mask usage. Catching up with research they now encourage it in indoor situations where you can't distance, even though the recommendation still is to not even be there if possible. Leaving it as a tool available if current measures aren't enough.