you are right it does work, problem is people have to get the vaccine, and certain groups in the population refuse to get it. Only about 15% of our station has been vaccinated... two folks(non vaxxed) who got covid and are recovered both continue to wear their masks, one still can't taste, and the other lost a family member. I fully support Darwin here, if you want to take the chance go right ahead, but I have my family to protect, children too young to vaccinate, currently there are several cases in the local hospital with children in bad shape due to covid. Heck I'll continue to wear a mask just so I don't get a cold or flu.. first year in many that I didn't get sick.