I'll guess it's because the apocalyptic threat is something direct and personal that we have aversion to. It's "People get sick and the medicines don't work" o

I'll guess it's because the apocalyptic threat is something direct and personal that we have aversion to. It's "People get sick and the medicines don't work" or worse, YOU get sick and the medicines don't work. It's a simple, easy to imagine situation. Climate change effects don't have the same combination of simple, personal, accurate, and bad.