That's actually what Dr Fauci initially talked about with regard to the general public. With how masks are worn and used in practice, he was probably right.
Fauci: There’s no reason to be walking around with a mask. When you’re in the middle of an outbreak, wearing a mask might make people feel a little bit better and it might even block a droplet, but it’s not providing the perfect protection that people think that it is. And, often, there are unintended consequences — people keep fiddling with the mask and they keep touching their face.
LaPook: And can you get some schmutz, sort of staying inside there?
Fauci: Of course, of course. But, when you think masks, you should think of health care providers needing them and people who are ill.