You're contradicting yourself to an extent. I don't like to nitpick but "Now adding more to the fact why porn isn't addictive" and "You might say it's a psychological addiction" definitely go against each other. A psychological addiction is surely an addiction like any other one as it falls under the addiction umbrella.That means almost everything you do on a daily basis lol starting from eating & exercising down to thinking critically or making social interactions. Nah, porn is not addictive. Food isn't either. In fact, these 2 (food and sex) are the primary rewards embedded in all of our brains, as they are necessary for a specie's survival.
Now adding more to the fact why porn isn't addictive... it's not, because you don't crave for it if you don't use it for a few hours or a day (like heroine for example). You don't get psychical pain if you stop watching porn and you have absolutely no risk of dying. You might say it's a psychological addiction for sure, but such addictions can be stopped instantly if you focus & tell yourself that you don't need that addiction, that there are better options out there (like real fucking sex for God's sake) or simply by keeping your mind occupied with other things rather than porn.
Food can be addictive because like anything else that alters brain chemicals it can take on a life of it's own to the addicted. It can replace an empty spot in a person's life and provide any specific, desirable feeling. The people who are 1000 pounds are proof of this. Of course these addictions come off as fairly petty, but they do happen. Take away food, pot, porn, etc from the addicted and they might not go through life threatening withdrawals, but stuff like severe migraines, depressive and bi-polar like mood swings as well as many other things can happen. Those symptoms themselves aren't life threatening, but can lead the addict to perform life threatening actions.