But, think back to any book you've read recently and you'll realize that there are rarely any photos required to illustrate what the writer is creating.

As for your pigs and hamlet, I've used AI for some very specific things like portraying Charles and Camilla as deranged gluttons, and to create a patio with a yellow awning for a fiction story, but for the most part, real photos can be used as an author would choose a photo for the cover of a novel.