Here is the thing. People are dumb. They will do dumb things. So, masks aren't going to be 100% effective. But, they will be some percentage of effective and even if that's only 50% effective it could slow the virus down enough to be able to maintain some semblance of an economy while not overwhelming the healthcare system. As Dave said, it's either we try going to social distancing with PPE or we all stay home until this is over.