So, if you hire a builder to implement your design, the end product is functional, i.e. it should provide you with shelter and keep you warm. The builder's craft serves a purpose beyond itself. But when you "hire" an LLM to write prose, what is the functional product? It's the prose. You don't read a novel and then throw away the sentences to get at the story underneath. The sentences are the story. So outsourcing the writing isn't like hiring a builder, it's more like designing a house and then handing someone else the keys.