So at best we don't know whether or not AI CSAM without CSAM training data is possible. "This AI used CSAM training data" is not an answer to that question. It is even less of an answer to the question "Should AI generated CSAM be illegal?" Just like "elephants get killed for their ivory" is not an answer to "should pianos be illegal?"
If your argument is that yes, all AI CSAM should be illegal whether or not the training used real CSAM, then argue that point. Whether or not any specific AI used CSAM to train is an irrelevant non sequitur. A lot of what you're doing now is replying to "pencils should not be illegal just because some people write bad stuff" with the equivalent of "this one guy did some bad stuff before writing it down". That is completely unrelated to the argument being made.
I first thought this was a bad idea by Paypal but you opened my eyes