Yeah the whole porn addiction thing is nonsense especially with how religious right often portrays it. They make it seem like a genuine drug where watching porn will ruin you and your relationships and it wont be long before you’re shunning life and relationships because you’re too busy studying your porn.
I do think that it can be a sign of other mental illness in one’s life. People who utilize livecams and chats can find themselves in parasocial relationships, and people can self medicate with a quick dopamine hit by watching porn.
Diagnosing the root cause as porn addiction is like diagnosing someone with a hoarding disorder as having an old newspaper addiction. Like no this is a symptom of something bigger and healthy people are able to consume the news without it becoming a problem.
This is the case with literally all addictions. Food, gaming, drugs, drinking. In some cases the addiction can is physically destructive and has to be treated first to stop the abuse of the body (drugs, drinking, sometimes food). Other times it’s not physically going to kill you and you need to treat the root cause first. But all addictions stem from dissatisfaction with life, anxiety, depression.