Just something that I feel like I have to remind people of whenever it comes up: mainstream psychology does not recognize porn addiction as a real thing, based on the lack of evidence/lack of consensus to support a consistent diagnostic criteria. The only actually recognized related condition is compulsive sexual behavior disorder, which is not using an addiction model.

I'm quite sure that there has to be at least someone who has problematic pornography use habits which aren't just a symptom of another issue, but without anyone being able to pin down a consistent set of diagnostic criteria, then there's barely any way to identify who those people are separately from people who report it but whose distress is coming from something else. One study done on self-reported pornography addiction found that the strongest predictor was moral objection to pornography, not amount of porn use. Another two studies found that antagonistic narcissism is an even better predictor (might read it when it isn't 3AM). Your analysis is actually touching on this somewhat -- a narcissist's interest in "addressing their pornography addiction" is mostly that they think that it will elevate them above the porn addicts, or whatever other target.