You are right, I am over overcomplicating because the most important aspect is that making lewd images of children in isn't protected by free expression laws anyway.
But as a side note. If I commissioned an artist to draw a portrait I would own the picture. I wouldn't be the one that made the picture. Even if I gave the artist detailed instructions it wouldn't make me an artist. I have every right to commission art but if I started saying "look at the art I made" people would probably disagree. Likewise, if you ask AI to draw you a picture you have not made the picture. You are not an AI artist. It's not that I want to tell artists what medium they should use. An artist could create something deeply meaningful with AI, for example using AI images to create collages etc. But the AI image itself is not an artistic product.
It matters because cartoonists have drawn crude pictures for years often of real people. And slightly odd fans have drawn creepy fan art for a long time as well. It might be creepy and odd but those are created by humans. AI isn't. And also let's you request images that look real. A really good artist who hates Elon Musk could spend a long time doing a photorealistic image of his mother undressed and crying. It would take ages though and you would hope most people would think what the hell am I doing part way through and stop. But AI let's you commission images in the blink of an eye with not effort at all or creative work. And those images look eerily real in a way that could be compulsive. I think that people who draw pictures of their favourite film characters as furries, or Kpop idols in gay relationships are odd. At least they are doing something creatively themselves though and you do have to think. Asking AIs to generate explicit image after explicit image can be done withe the same mindlessness as you see people flick through TikTok shorts.
That doesn't mean we should ban AI or anything. But I don't think it should be thought about in terms of freedom of expression/speech. Users are consumers not creators.
Edited for typos. Also, that's why I think they can make laws against making non consensual sexual images of people with AI without it affecting cartoonists etc.