You completely ignored everything said about both its ubiquity.

Not really. I stated people will always have access to porn and people will always seek it out. Supply and demand. You can’t force people to stop watching porn. That’d be like asking people “don’t have sex”. For the majority of the population, sex is considered a ‘basic need’ for sexual wellness. One way to indulge in that is to watch pornography (regardless if it’s considered mild like blindfolds and roleplaying to something much more serious like pretending to kill someone)

its psychological cost.

Most people do not develop a porn addiction. Most people do not develop some kind of “severe fetish” (like murder, arson, etc.). Many people have some degree of sadism and/or masochism. This is not inherently dangerous in consensual settings. There is a big difference between domestic violence and consensual BDSM play.

his point that restricting access is the path.

There’s already legal restrictions and restrictions websites put up (like having the “you must be 18+ to access this website” and in some cases “21+”). However, it is very difficult to enforce this to have minors stay out, because then you’re getting into the “violation of privacy” if they require any kind of ID for verification (even if a website promises to delete the data the moment say a moderator overviews it, there’s no guarantee that this information can’t be stolen or used inappropriately by employees).