I think you are trying to overanalyse and overrule the experts here. Experts are saying that with the regards to the whole population currently community wide

I think you are trying to overanalyse and overrule the experts here. Experts are saying that with the regards to the whole population currently community wide booster shots are not needed. It may not apply to each individual case (such as immunocompromised etc., or people with very specific risk, like those going to Vietnam) but this was never to be meant an individual assessment. Many people are confusing these two things. Even though it does not apply for majority of readers, trying to imagine a different situation for a specific individual is not necessary.