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.