Well-read atheists have more credibility

That movie was more about the AMOC collapsing (which is projected to happen between now and ~50 years), but uncharacteristically (/s), Hollywood got the science wrong.

I’d guess, in this case, imagining a wrongfully imprisoned grandma is thought to be more immoral than “just” a 50 year old. It also causes readers to imagine their own grandma in the same situation, instead of a stranger.