No wait she's totally right. I mean, India and Pakistan are very conservative about the circumstances under which consentual sex is allowed and they totally don't have a rape problem.
Regarding child porn, there's a great New York Times piece from a couple months back about how victims of child pornography are often profoundly injured by the thought that strangers are watching videos of them being raped. I'll see if I can dig it up later, it does a great job of laying out the psychological and legal landscape regarding victims.
The writer doesn't seem to quite grasp it, but unwittingly demonstrates an important point about rape. The harm of rape is entirely psychological, entirely bound up with the idea that sex is important - sacred, even. The author places a very low psychological value on sex, which is why she doesn't get how something so abstract as the idea that there is private viewing of child porn could possibly injure the victim and subject of it. To her it's no different than a youtube video of a guy involuntarily being hit in the face with a pie would be harmful. (the difference is in degree and not in kind, but it's a pretty fucking huge difference in degree.)