Being pro-vaccination is not a belief but based on a plethora of facts and evidence. If non-vaxers would be 1-2% nobody would spill a word, but the numbers like 20-30% are a serious threat in terms of them needing hospital beds. As they die away the threat becomes less, but until then they cause costs and are a considerable burden. You cannot really compare this with other diseases like from smoking etc, because the numbers - although still too many - are manageable, unlike a Covid outbreak. But over time according to Darwinian principles the problem will solve itself.