I think sometimes there is Association between an Addiction and what an Addiction can Cause.
A person can be Just As Addicted to using an e-Cigarette as they can be to Drugs and or Alcohol. But the Addiction to Drugs and or Alcohol can Cause Much More Serious Problems and have Much More Serious Repercussion.
Doesn't mean that the Addiction is Any Less with something Else. Just means that Ones Addiction can have More Greater Consequences than the Other.
... which is why, early in this thread, I asked OP for his definition of addiction. Never did get an answer. There are many kinds and degrees of addiction: clinical, physical, psychological, cultural, etc., etc. Many people will talk about "addiction" without really knowing what they mean and assume everyone else means/understands the same thing.