Religion

There’s several reasons for the so-called “universal” attitude you describe all of which are explainable so it’s not as if it’s a huge mystery. Has a lot to do with our innate survival instincts, fear of the unknown, and susceptibility to manipulation of those base instincts.

Meanwhile most religions subscribe to the idea that humans are transcendent of the rest of the animal kingdom(even though we really aren’t). Even if one subscribed to the idea of human exceptionalism the one defining feature of humanity is certainly reason, which allows us to explain our emotional want of imaginary sky daddies, and rise above any primitive desire for them.

Belief in deities requires the abandonment of reason which is exactly the opposite of why people “believed” in black holes. Comparing those two things as if they are no different isn’t exactly accurate.