Are the findings of the Rat Park experiments applicable to porn addiction? Many people say porn is addictive, but the conversation around this sounds quite similar to the conversation around drugs -

https://www.yourbrainonporn.com/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4600144/

which hold that substance and not setting is the main driver of addiction.
In the Rat Park experiments the addictive power of morphine was negligible if the rats had a happy social scene instead of a blank cage to live in - see here for clever cartoon on it

https://www.stuartmcmillen.com/comic/rat-park/

http://www.brucekalexander.com/articles-speeches/rat-park

Extrapolating from rats to people, is it possible that porn addiction is less to do with the 'substance' and more to do with the social setting of the user ?
(Note: there are critiques of flaws in rat park experiment but I don't know where to find them).
As a therapist working with patients suffering from all kinds of addictions – drugs, porn, computer games, social media, gambling, sex, etc. – the simple answer is that addictive behavior is influenced by:


currenct life circumstances (Rat Park versus cages, if you want)
personality (some people are more prone to addiction than others)
life experiences (childhood abuse and other trauma)


So yes, a person in a happy romantic relationship with a supportive network of friends and family working a satisfying job will most likely not become addicted to porn from masturbating to it every now and then, just as they won't become addicted to THC from smoking a joint on Saturday evenings, but the influence of these life circumstances do not protect someone from becoming addicted when they make traumatic experiences such as the death of a child or when their personality is "addiction prone" (e.g. high neuroticism, low conscientiousness, high impulsivity, high reward and threat sensitivities, and so on).