Most of what you’re repeating about porn “normalizing” things and “desensitizing” viewers is straight out of the puritan handbook. There is evidence that men who overconsume porn and don’t have a healthy sex life can fall into self-destructive patterns, but porn consumption doesn’t work like a drug. It’s not like the more you consume the more hardcore of content you desire, or that being exposed to certain types of porn will create new preferences that you wouldn’t otherwise have had. This is just long-standing anti-sex-work propaganda that tries to liken pornography to narcotics.
People who consume CSAM are already into that kind of thing. Seeing CSAM isn’t going to turn anyone into a pedophile just as playing GTA isn’t going to turn anyone into a hardened street criminal. The goal should be to protect children, not to censor any content that sexualizes youth, because that really is a slippery slope. More on that here: nypost.com/2010/04/24/a-trial-star-is-porn/