Would I do opium again? Sure. It was fun. Would I do medical grade heroin or morphine again, under controlled circumstances with a nursing staff dosing me? Yeah. It was fun. Did I have some weird urge to go out and do it frequently? Nope. But to be fair, lots of folks drink on more than one occasion as well. They get high more than once. They might even have more than one drink or hit in one day. Simply wanting to do something again doesn't mean anything. I've done acid more times than I can count, and I wouldn't call it a habit. The only drug that I'd probably do more often if it were not dangerous to do too often is MDMA because it feels spectacular (better than opioids, to me anyway), but I'd not even call it a strong urge.
This isn't addiction, nor is it anything uncontrollable in general.
Unless you are implying that folks get uncontrollable urges, and in that case, please back that up with facts. Though I've met my share of addicts, most things just aren't instantly addictive. Even heroin isn't that way - especially if you actually improve an addicts like (hence, troops addicted to heroin in wars came home to be non-addicts).