Problem with this discussion is most don't understand addiction. It's everywhere. Not just drugs but in every aspect of human endeavor. It's not the drug, it's the addict.
Put this way, prostitution is a way of acquiring a pimp. An addict is an addict before they ever try something they know will be addictive for them.
Once you learn addiction, you will see it in the most surprising places. Relationships, food, alcohol, y'all know it.
How do you spot addiction? Addiction is nothing more than compulsive behavior. An addict not only can't say no, they can't stop. It really doesn't matter what they are compulsed about, their response will be the same.
For most, this will never be a problem. For the addict, many things are a problem.