Sorry, that sounds like bullshit to me. I remember becoming aware of my kink way before I became sexually aware. In hind sight it’s clear it was a sexual thing, but at the time it had nothing at all to do with sex. I had a comic in which a girl got spanked for being bad. I didn’t know why, I just knew I liked reading that page a lot. Sometimes I’d read it for hours. I was about 7. No abuse, years before I got molested, my parents didn’t even spank me, never made the link to sex acts until somewhere in my 20s. I just enjoyed it.
Talking with other kinksters, my story is a lot more common than I thought it would be. It’s just that (just like me) kids do not really talk about the things that make them feel happy and funny in a way they can’t explain.