It's one thing to enjoy a vice, it's another to intentionally manipulate someone else into falling deeper and deeper into that vice to your benefit. Prohibiting that kind of behaviour isn't the same as prohibiting the vice itself.

The sociopaths that gleefully exploit human psychology for their own financial gain should be stamped out.

> Most addicts love their addictions; most of the ones that don’t eventually stop.

Source? This doesn't match up with any addict I've interacted with or seen in media. The majority seem to fall between being unaware, in denial, or deeply unhappy about it but are unable to break their dependency.