I wouldn't say there is anything inherently wrong about child inappropriate contentography, under your definition. As a general rule, it isn't wrong to have a picture of a naked minor on your phone. It's wrong in some circumstances.
Your statement doesn't show you know why child inappropriate content is bad (though I suspect you do really know). The problem with child inappropriate content isn't that child inappropriate content is arbitrarily bad, it's the exploitation and abuse on children.
But if nude underage pictures are self-taken and fully consensually, there is no exploitation or abuse, and so no wrong.
I'm kind of surprised you'd think a concept is wrong, even without harm, violation or exploitation. To me that is authoritarian oppression. You're generally pretty liberal and fair.
(I mean this post in a nice way, not accusatory. I like you.)