I knew a guy that grew his own opium to manage his pain. He went to work every day, was never late, did his job, was good to his family. He managed his doses well. Was he addicted?

What do you mean exactly when you say "the actual substance is addictive"? Does it contain addictaniolol? What you are saying makes no sense. People are either prone to be addicted to a substance or they aren't. Blaming the substance doesn't help anyone and it means nothing.

If "the actual substance" were actually addictive, as you seem to believe, then every person without exception would be addicted to it after one try. Clearly that isn't the case, therefore there is nothing inherent in opium, nor any other drug, that makes itself addictive.