It's not even that. Sure, there's the devout Mormon factor that goes from superficial abstinence to sex crimes in a heartbeat.
But if you can be a good Christian and can enjoy sex with your partner, then isn't just the idea of dismissing porn burying it underground again? It sounds bizarre, but I honestly think there's a role for Christian porn much in the way you saw in the 1980s bands playing Christian heavy metal for that matter.
I see what you are saying the difference is sex between two partners usually contains some caring, love and or respect. Porn on the majority contains none of that and is empty superficial gratification