You mean like the right to not have your likeness fed into an algorithm and assembled into pornographic content without your consent?

What you are describing here is just a sexual fantasy.
It could be debatable that someone cannot imagine to have sex with the hot actress of the day (or the hot colleague) or to create a fake nude image of her to fantasize on, without harming in any way the object of his fantasy.

Or does having your image laundered by an LLM somehow magically make that ok?

It depends. How do you consider a personal sexual fantasy involving other people ?

That said, since the problem is the CSAM image in itself, as it should be, punish who create and distribute the images (like the real ones), not the platform/tool used to create them.
Else you should also punish who build the camera used to take the real images, don't you think ? (btw, you would never be able to punish someone who draw a CSAM image and keep it for itself, like you would be never be able to punish who create a fake image of the hot actress and keep it for itself, without violating his privacy)