Every convincingly real CSAM encountered online has to be treated as potentially being the real thing. Even material with clear AI markers needs to be treated as such since that could be an attempt to obfuscate real material. Allowing AI generated CSAM while banning real material seems to be impossible to enforce and would only further a normalization of encountering CSAM and pedophilia.
If you catch a pedophile and they have actual CSAM on their machines, you also do not have to litigate which ones are real and which ones are fake. If fake ones are legal the burden of proof is now shifted as the pedophile can easily argue that pic that contains documented abuse of your daughter is in fact just AI generated.
Society is always about weighing rights against each other. And while "protect the children" has become the hypocritical rallying cry of politicians that want to introduce a surveillance state, in this case I would happily argue for keeping a strong stance e en as someone who has repeatedly argued against surveillance. Pedophilia is shunned in most societies for a reason and in my opinion it should remain so. If people have that unfortunate sexual urge, society does not profit from safely enabling it while producing many potential risks for actual victims and a lot of work for those policing it.
Now it is known that many pedophiles never touch a child. Normalizing pedophilia as a society would likely change that. Allowing CSAM if it is AI generated (from real training material btw.!) may change that. And this is not a thing we need.
Instead society should normalize it for non-acting pedophiles to seek therapeutic treatment.