Are they forthcoming with information about where and how people were infected?
That is not the job of the hospitals to investigate, they are there for treatment. The governments have released statistics about how many people have likely got the virus while at work vs at home, but in most cases, it is impossible to concusively prove just where the infection happened.
Everything has its thresholds and limits
Indeed. Staying at home because of a tiny risk may be unreasonable. Wearing a small mask that does not impede you is not. You are after all not just endangering yourself, but also others who may live in close proximity to you who have yet to receive a vaccine and are thus even more vulnerable to a dangerous infection. I thought you have grandchildren? You want to be responsible for them having lost their sense of smell or taste, or worse?
Where is the information that people vaccinated against the flu should avoid each other? Or polio?
It is several times more infectious for starters. You can't catch Polio via breathing, thus a mask is unnecessary.
No vaccination can gurantee 100% safety, but most of them have been steadily improved to a rate close to it. Meanwhile the vaccination against Covid is still young, with most of them offering around 90% protection. Which is great, but not perfect.
support policies that simply nurture the virus?
You nurture the virus if you allow it to spread and mutate. If a variant manages to infect a person, you certainly do not want it to infect another one und multiply, thus you take precautions.We have seen what happens if you let the virus rampage in Brazil. First people got infected by the initial virus, and then believing themselves to be safe by a mutation.
Wearing masks in public transports and retirement homes should become common sense if not common policy like it already is in many Asian countries that experienced previous pandemics. This would also help reducing the deaths by flu among the old and vulnerable people.