It's complicated. Being into this doesn't de facto represent an attraction to actual kids. I mean, for one it's not visually realistic. Just as people who are into anime guro don't necessarily want to see actual gore or cause actual mutilation and stuff. Being drawn can make it enough of its own thing that it isn't necessarily reflective of anything other than being into the drawn stuff.
There's also the layer of if you see yourself as audience to what's depicted, or identify with the adult, or identify with the child. Wanting to be small and be fucked by an adult is different from wanting to be an adult and fuck a kid. Since, you know, in the former case you want to be fucked by an adult.
tldr: shit's complicated and you don't know other people's minds