Not OP, but my gut agrees with his. Very tricky issue and I don't think anyone can say who is "right", so I fall back to one universal principle to inform my opinion here, as well as a general societal observation.
The principle: moderation is almost always best. This applies to food and exercise, to work/life balance, to sex and drugs, and everything in between. Pornography consumption generally does not represent "moderation" of sex, but the extreme end of it - you crave sexual stimulation so badly that you resort to watching other people having their sexual urges fulfilled (which can then make the porn consumer less motivated to pursue healthy avenues to achieve their own sexual fulfillment, leading to a downward spiral). People will always be drawn to porn because sex is the one "addiction" that almost everyone is born with, but having a thin healthy layer of public shame helps to encourage people not to go too far down the rabbit hole.
Societal observation: society seems to be becoming shallower, more transactional, particularly in the realm of dating. In my opinion, unrealistic expectations of each other in a sexual context is one of the biggest causes of this, because when those expectations go unmet people move on to the next person they find on some app, instead of investing time into building a relationship and seeing if it can work (and growing themselves as a result of that investment). I think pornography contributes to these unrealistic expectations, and thus to making society more shallow.
I'm always cautious to dive into this too much in today's political climate, but I also think there are significant societal downsides to the more extreme levels of sexual liberation that are rapidly becoming normalized in American society (possibly all of western society, but I'm a bit too ignorant to speak on that). I think pornography contributes to this as well.