If it’s not clear by now, successful sales decks follow the same narrative structure as epic films and fairy tales. Your prospect is Luke, and you’re Obi Wan, furnishing a lightsaber to help him defeat the Empire. Your prospect is Frodo, and you’re Gandalf, wielding wizardry to help him destroy the ring. Your prospect is Cinderella, and you’re the fairy godmother, casting spells to get her to the ball.
The reason for this is simple. You’re trying to fill in gaps our brain would have gladly tackled on its own. You’re trying to change the lives of 1,000 people instead of one. You’re lowering your original thought to the lowest common denominator.