I’ve spoken to many evangelical Christians IRL who honestly believe that Jesus will come back in their lifetimes, maybe because much of the New Testament is written with a sense of urgency which heavily implies something dramatic is going to happen very soon.
But those books were written centuries ago. And there have been many people in those intervening centuries who read them and assumed something would happen very soon. And they were all wrong.
I’m going to guess that none of these people have seen 2001: A Space Odyssey.