Ruin Explorer
Legend
No, it isn't.Causes always matter, or verisimilitude is broken.
That's a dreadful science-obsessed worldview that absolutely doesn't match with the worlds of fantasy, whether it's Tolkien, REH, Fritz Leiber, Moorcock, LeGuin, Jordan, Kay, or whoever!
There are very few fantasy settings where heroes know exactly why they're capable of heroic feats, and the ones where they do tend to lean closer to being superhero settings (c.f. Stormlight Archive etc.) rather than typical fantasy settings. Conan doesn't know if the gods are helping him or if he's just that badass. He may believe one way or another, but he doesn't know.