Established fact? You are trying to make a porn addiction appear as bad as a meth addiction and that is just not based in reality. The outcomes and damage of substance abuse are more severe and should not be conflated.
I said nothing of the outcomes, though I wouldn't be so sure. We don't have any data on the outcomes of porn addiction. I wonder how many young men have committed suicide in large part due to their porn addiction, or how many have lost their jobs. It's certainly a non-zero number.