Sexual preferences are a given; some people are attracted to the opposite sex, some people are attracted to the same sex, some people are attracted to children. Nothing they (or anyone) can do about it, lest one decides to indulge in so-called "conversion therapy".
Of course, children can't consent, and abusing children is horrible. And child porn is horrible because it implies children have been abused to produce it.
But AI-generated child porn, however nauseating it might sound, doesn't hurt anybody.