GH> “mask-on/mask-off” comedy under the current rules where you open a bottle of water
I am not defending a specific policy, but the idea is to reduce risk while minimizing inconvenience to the public. Obviously, no free-loving person would sacrifice his lunch to protect some stranger. So, thus the rules. Presuming that 80% of public have masks on 80% of the time, this reduces risk a lot.
See the MI report I mention above comparing school with and without masks. Significant difference even presumably enforcement was not 100% and they also had breakfast, lunch, and recess. Report actually had a group of “partial mask mandate” – and it was much closer to masked than to the no mask.