You can't abuse children who do not exist.
The entire god-damn point of saying CSAM instead of CP is to distinguish gross drawings from photographic evidence of child rape. A computer drew these images. They are a fantasy of linear algebra.
Look. There's people who, when told about new recreational drugs, tut that they'll have to be banned, because they get people high. That's not why those things are illegal. Or at least that's not the official excuse, for an obvious limitation of your right to do whateverthefuck alone and in private. Officially, we're only supposed to kick in doors and put people in jail over demonstrable and serious harm. Officially, all the drugs you can't get at Walmart are supposed to be ruinous to individuals and society.
We don't outlaw certain JPEGs because they make you feel icky. They are the result of immense individual harm. These aren't.