Sounds more like bad parenting to me.
Unsupervised internet access at age 10
Didn't know anything about sex by age 10.
His parents let him down by not being responsible enough to know the risks or to pass the right knowledge onto him.
My exes little girl was 9 when we dated and she never got to play online alone at my house. She was always playing beside me or her mom. If she did play alone in her room we monitored the laptop but I can only think of 1 time that happened because she always played some online kids game and would sometimes want my help or advice
I had sex ed classes in 5th grade and we talked about it in school even before that. We watched porn as young kids but only to laugh at it.