AI porn is essentially a perfect technology: there's no performers, so there's no consent or abuse questions, and it can perfectly calibrate to user desire so there's less of a need to search for what you want.
There's even an introspective component: rather then trying to find someone you can convince to do what you want (manipulate) the goal is replaced with a creative one - finding a way to improve the models to generate what you want, and reflecting the motivation back at the consumer.