Gary Gygax quotes
The essence of a role-playing game is that it is a group, cooperative experience.
There is no winning or losing, but rather the value is in the experience of imagining yourself as a character in whatever genre you are involved in, whether its a fantasy game, the Wild West, secret agents or whatever else. You get to sort of vicariously experience those things.
Role-playing isn't storytelling. If the dungeon master is directing it, its not a game.
When AI approximates Machine Intelligence, than many online and computer run RPGs will move toward actual RPG activity. Nonetheless, that will not replace the experience of "being there" anymore than seeing a theatrical motion picture can replace the stage play.
The secret we should never let the game masters know is that they don't need any rules.