The end goal of any measure, including vaccine passes, has always been the same: preventing a large number of deaths. Vacccines still prevent a large number of deaths, both directly (strongly reduced risk of death from Covid) and indirectly (reduced strain on the healthcare system). These hold true even if vaccines only effect outcomes after getting Covid and have zero effect on transmission rates at all, they're not up for discussion. As such there really isn't much of an ethical dillema here. There is plenty of data available on all of these points. Whether someone somewhere incorrectly touted vaccines as stopping transmission at any point isn't worth discussion, it's just another one to add to the list of "uninformed statements made about vaccines" which is billions of lines long at this point.