> Opiate addiction comes along with flu like symptoms, insomnia, restless legs/arms AKA crazy legs, and an ever present anxiety that you really really want some that will make you do some weird shit just to get it. ... Many are all in your head, or, can be overcome by willpower, but definitely not opiates

Sure, but one can be dependent on e.g. SSRIs or SNRIs. But they aren't addictive!

Dependence + addiction is a special problem with opiates, I think you can die from withdrawals?