I'm just gonna put this out here and hope not to end up on a list:
Let's do a thought experiment and be empathetic with the human that is behind the predators. Ultimately they are sick and they feel needs that cannot be met without doing something abhorrent. This is a pretty fucked up situation to be in. Which is no excuse to become a predator! But understanding why people act how they act is important to creating solutions.
Most theories about humans agree that sexual needs are pretty important for self realization. For the pedophile this presents two choices: become a monster or never get to self realization. We have got to accept that this dilemma is the root of the problem.
Before there was only one option of getting a somewhat middleway solution: video and image material which the consumer could rationalize as being not as bad. Note that that isn't my opinion, I agree with the popular opinion that that is still harming children and needs to be illegal.
Now for the first time there is a chance to cut through this dilemma by introducing a third option: generated content. This is still using the existing csam as a basis. But so does every database that is used to find csam for prevention and policing. The actual pictures and videos aren't stored in the ai model and don't need to be stored after the model has been created. With that model more or less infinite new content can be created, that imo does harm the children significantly less directly. This is imo different from the actual csam material because noone can tell who is and isn't in the base data.
Another benefit of this approach has to do with the reason why csam exists in the first place. AFAIK most of this material comes from situations where the child is already being abused. At some point the abuser recognises that csam can get them monetary benefits and/or access to csam of other children. This is where I will draw a comparison to addiction, because it's kind of similar: people doing illegal stuff because they have needs they can't fulfill otherwise. If there is a place to get the "clean" stuff, much less people would go to the shady corner dealer.
In the end I think there is an utilitarian argument to be made here. With the far removed damage that generating csam via ai still deals to the actual victims we could help people to not become predators, help predators to not repeat, and most importantly prevent or at least lessen the amount of further real csam being created.