Re your 2 I take it you mean wearing a mask is a restriction and the basis for wearing one is sketchy. As said there has been countless tests that show 3/4 layer disposable medical/ surgical masks both help prevent catching and giving Covid. Even a rag helps prevent giving it. Not sketchy at all.
Evidence that mask wearing protects you in the real world is more difficult because of other factors involved like population density and climate, but looking at registered infections per 100K inhabitants in Countries where I think, and know in Thailand, that people mostly wear masks when they leave home the numbers are at the low end. Other than Thailand that includes China, Taiwan, Vietnam, Cambodia, Laos, Indonesia, Phillipines and even war torn Myamar.