Porn is absolutely problematic but there's a difference to it distorting societal views and expectations around sex and whether or not it's addictive. Porn gets an interestingly unique bad rep. These are fantastic points to bring up to help center ones understanding of addiction medicine and porn's effects on society. Thank you for sharing the links.

He's citing valid results from actual research papers, but I think he might be presenting it slightly misleadingly, perhaps with an underhanded motive, by implying no one has any issues with porn. But the general conclusion from the article seems to be that porn itself isn't harmful or addictive, but that other factors can cause it to be harmful. If somebody is using porn excessively, then it's most likely because there's something else wrong, the porn is the result of the problem, not its cause. At least that was my take.

Gary Wilson's Your Brain on Porn is a problematic source. It's not a peer reviewed academic source and its citations should be taken with a pinch of salt. The tone of the website often appears downright unhinged, especially when discussing the work of clinical experts such as neuroscientist Nicole Prouse.

https://en.wikipedia.org/wiki/Gary_Wilson_(author)

https://en.wikipedia.org/wiki/Nicole_Prause

Clinical Psychologist David Ley's publishing history includes many relevant contributions to peer reviewed publications.

https://www.davidleyphd.com/publications

https://en.wikipedia.org/wiki/David_J._Ley

Neither APA's DSM-V nor WHO's ICD-11 recognise any addiction disorder related to pornography. While ICD-11 recognises compulsive sexual behaviour disorder (CSBD), the absence of a close fit to established addiction models has been remarked. On the other hand, there is a substantial cottage industry based on this pseudoscientific concept.

The abstract of the meta-analysis might help you understand what they found

The notion of problematic pornography use remains contentious in both academic and popular literature. Although the mental health community at large is divided as to the addictive versus non-addictive nature of Internet pornography, substantial numbers of individuals report “feeling” as if their use of Internet pornography is problematic. The present work seeks to construct a model related to problematic pornography use that is clearly derived from empirical literature and that provides directions to be tested in future research. The focus of the present work is on those perceptions as they relate to the overarching experience of moral incongruence in pornography use, which is generally thought of as the experience of having one’s behaviors be inconsistent with one’s beliefs. To this end, we put forth a model of pornography problems due to moral incongruence. Within this model, we describe how pornography-related problems—particularly feelings of addiction to pornography—may be, in many cases, better construed as functions of discrepancies—moral incongruence—between pornography-related beliefs and pornography-related behaviors. A systematic review of literature and meta-analysis is conducted in order to evaluate support for this model, and the implications of this model for research and clinical practice are discussed.