Vaccine were never meant to make people immune; they have been approved and evaluated based on their effectiveness to reduce severe cases and deaths. We have been lucky enough that they have also been effective to reduce the spread. Even now, they are still very effective with respect to their main goal: reducing the number of people getting into the hospital because of COVID.
After ~1 year of vaccinations and ~2 of COVID, I hoped that would have been crystal clear for most people, or, at least, for most of HN users.