It makes the idea of a trying-to-be-helpful AI scarier. Imagine a post-scarcity world in which you merely have to ask for whatever you want and it'll be delivered to you for free, but everyone still lives in squalor because if you ask for a coffee table you'll instead get one of every type of coffee table ever made and then starve to death in your house because the food delivery drones can't fit through the wall of coffee tables.