"Unless self-sexing interferes with life responsibilities or partner lovemaking, it’s not a problem, no matter how frequent."

Yes, but where's the evidence/proof that it doesn't frequently interfere with partner lovemaking? While certainly not scientific, there's an awful lot of anecdotal evidence out there that suggests it can and does interfere. There are many women on reddit deadbedrooms, for example, who report being stuck in dead bedroom relationships because their partners would prefer to get themselves off to internet porn rather then have sex with them. And there are many men on reddit nofap who claim that viewing porn diminshes their desire for real life sex with their partner.