To be fair, as a christian I don’t believe in goblins and unicorns. I do believe in something though. I suppose you do too, and in the end our core beliefs might not even be that different.
But that’s just where you happen to draw the line and is not really relevant. You do believe in whatever your bestiary happens to contain, like magical burning bushes, giants, and super-strong men with magical hair. Whether a goblin is in there or not is an implementation detail.
