This is likely because you're projecting positions onto the person you're responding to that they never stated, and probably don't hold. If you read their comments again, you will discover they said they themselves are vaccinated, and offered no opinion about encouraging other people to get vaccinated as well. That was plainly not the topic of their comment. They are simply pointing out, correctly in my view, that life is not and never will be totally risk free, and at some point the risks that covid presents to the world at large will have to just be accepted, because the costs of lockdowns as countermeasures are simply too great. We can't continue to prioritize minimizing covid at the expense of all else forever.

As a side note, the fact that you read someone expressing skepticism of some measures of covid containment, and instantly leapt to "they must think encouraging vaccines is stupid" does not reflect well on you, and is a pretty strong indicator that you're spending a lot of time in an ideological echo chamber that's eager to "other" and strawman anyone that disagrees with its positions. Something worth reflecting on, if you're willing.