We already have a category called addictive personality disorder where someone is much more prone to being addicted to pretty much anything.

In the US, regardless of what type of addiction you have, it is considered mental health. Open market insurance like ACA does not cover mental health, so there is no addiction treatment available. Sure, you can be addicted to a substance where your body needs a fix, but it is still treated as mental care. This seems to go directly against what your thoughts are on addiction, but that doesn't say much as you're just some rando on the interweb expressing their untrained opinions. So am I, but I'm not the spouting differing opinions with nothing more to back them up than how you feel.