One could argue that the rise of people arguing against vaccination of children is directly related to those people not having direct experience with the horrif

One could argue that the rise of people arguing against vaccination of children is directly related to those people not having direct experience with the horrific realities of the diseases in question. That aside, millions of human deaths (annually or in total) is a horrific tragedy, but if we, say, managed to render a large area of land uninhabitable through ecological collapse for a generation or more, it might be far worse, both in some imaginary absolute scale, and for the people directly displaced.