That is not the same thing as consuming child sex abuse material, which is based on harm to other people.
No, it's not.
Cartoons and stick figures do not cause harm to actual children, yet these are just as illegal as full-fledged photographic CP in many jurisdictions. That's the problem with these stupid laws. Someone who likes to look at kiddie anime has issues, I'll agree, but they don't need to be locked up, as they haven't harmed any children or anyone at all. If you take that route, then we need to start locking people up for all kinds of moral "crimes" such as adultery, fornication, looking at (adult) porn, criticizing the Dear Leader, etc. under the theory that they're somehow harming society.
And alcoholics and drug addicts, it can be argued, are hurting their families and society too, probably more than someone looking at some pics at home. Drug/alcohol addiction causes a real loss of productivity at work, impaired driving-related accidents, etc.
Just like alcohol and drugs, it's basically impossible to eliminate the demand for CP; there's simply something miswired in the heads of people who like that. The answer is therapy, not criminal prohibition of everything that resembles it and locking them up. (Note that I'm *not* arguing for legalization of actual CP that involves real humans.)
And to extend this to the future: we can already create nearly photo-realistic movies entirely digitally, with no humans at all. There was a Final Fantasy movie over 10 years ago that was pretty impressive for the time, and it's only gotten better since then. Now amateurs are making very impressive short videos on their home computers. Before too long, it won't be hard to make movie scenes that look entirely real, depicting humans who don't actually exist, and someone's going to use that technology to make CP. Should that be illegal, when it can be *proven* that no humans were involved in the production? Something to think about. Because if that's illegal, under the theory that people interested in this stuff will inevitably want the "real thing" at some point, then basically you've invented a "thought crime" and created a witch hunt.