I'm not directing this post at you, because I know you don't buy into the Church. I'm just making a general comment based on my faith journey, for general consumption.
When I was younger, I used to think that the Church went a little overboard in opposing what seemed like harmless side effects of porn. What's the big deal, I thought.
Now, as I see the harmful individual and societal effects of porn, I think, "Wow...how did the Church know?"
Answer: It didn't know this would happen. It was just sticking to core teachings...which turned out to be far more insightful than maybe even many in the Church realized. I have a new appreciation for the harm of "victimless sins" (and therefore for the Church's long standing opposition to them), as those victimless sins actually heavily victimize the participant when repeated over time.