Many things can be addictive as that largely has to do with how a person's habits affect their life. One can play card games without becoming addicted.

But the same is then also true for cannabis, alcohol and likely some more drugs.. underlining OPs statement? Or not? Just confused.

Perhaps I am assuming too much of the subtext.

People commonly say things like this to suggest that it necessarily causes addiction which makes it a Bad Thing. It is true generally that it "can" cause addiction but only true circumstantially that it "does" cause addiction. Again, I may be reading too much into the comment but it seemed to be trying to make the "necessarily does cause addiction" point.