I think you are in the right morally, and legislative position is not relevant - it should be based on morals. Various countries have/had absurd laws, such as making it illegal to insult the supreme leader, suicide is illegal, and having legal slavery, heresy, the list goes on and on. Today we regard those laws as stupid and cruel, and hopefully one day we will regard persecution of addicts with the same incredulity as we regard witch-hunts