Mirroring the comments on Ars: Why should AI child porn be illegal? Clearly the demand is there, and if you cut off the safe supply, don't you just drive consumers to sources which involve the actual abuse of minors?
Another comment I saw was fretting that AI was being fed CSAM, and that's why it can generate those images. That's not true. Current image generating algorithms can easily generate out of distribution images.
Finally, how does the law deal with sharing seed+prompt (the input to the ai) instead of the images themselves? Especially as such a combination may produce child porn in only 1 model out of thousands.