I believe many stores would like to enforce the requirement for customers, however due to the fact that anti maskers have proven to be violent, as well as irresponsible and irrational. unfortunately, the poor store employees are literally risking their lives if they try and enforce requirements.
fully vaccinated people are being asked to wear masks again because the high number of irresponsible and selfish anti-vaxxers have allowed covid to proliferate to such an extent that we all must take precautions again. The fact is, it is much much harder for vaccinated people to catch covid, and so regardless of the fact that once infected they are potentially able to spread the illness, we would not be where we are if not for anti-vaxxers. The disease would not be spreading as it is without the antivaxxers and anti maskers.
(I also think antivaxxers seem to be inherently untrustworthy and willing to lie to avoid wearing a mask to protect themselves and others, necessitating an all or none approach)
The vaccines are safe and effective, and people are dying because people think getting vaccinated is a political statement - they are choosing to harm society as a whole based on completely fictional misinformation and political grandstanding,
and maddeningly, the anti-vaxxers and anti maskers will try and pass off new restrictions as ‘proof’ that the precautions and vaccines don’t work. Even though it is their own selfish, ignorant, and anti-social behavior which has led to this renewed outbreak and is literally, directly responsible for the deaths of countless people - the goal posts people complain about moving keep moving because of them. It is not a mystery, it is because the measures are only effective when a majority of society actually cares enough to contribute just the tiny, minimal amount that has been asked (by masking, social distancing, and getting vaccinated).
This current crisis was 100% avoidable, and the blame for it rests completely with the anti-vaxxer movement (not those who cannot be vaccinated due to real health issues, they are victims of the antivaxxers - to some extent even the antivaxxers are victims of this terrible disinformation movement - and many will die as a result)
I don’t mean to seem like is am attacking anyone here, but I am just so so tired, angry, and broken hearted by how many people just have no sense of personal responsibility, and who have entirely disregarded the social contract. The fact that these store employees already braving working with the public during a pandemic also have to fear for their emotional and physical safety due to antisocial conspiracy theorists is just so awful. For anyone facing that right now I am just so so sorry.