This reminds me of a lesson that I learned, I’m embarrassed to admit, from Tom Brown Jr. (who later threw me out of his school for trying to verify his autobiographical claims).
If you’re walking through the woods with a child, and they’re interested in all the different plants that they see, they’ll ask you what each one is. And, often, they lose interest in each plant after you tell them its name. They still don’t know anything about the plant, but they think they do, and it’s no longer mysterious and exciting to them.
This is the fault of the child, not the fault of the person who gave the plant its name.
On the flip side, I’d like to see less-rational characters in fantasy books. I can’t believe in pseudo-medieval worlds where the main characters have no ethnic, racial, gender, or class prejudices; have no superstitions; and never make decisions for religious reasons.
(In some fantasy, notably Tolkien, ethnic and racial stereotypes are allowed—but in those fantasy worlds, they’re true almost 100% of the time; and the author assumes that the reader, like the author, won’t even think of them as prejudices.)