And most who are introduced to pot never move beyond it.
Most who are introduced to pot never try it more than a few times (at least, that's what I've seen) because they hate the way it makes them feel, just like most who are introduced to whiskey never take more than a few sips because they hate the way it tastes.
On the other hand, many who were introduced to "Reefer Madness" propaganda have also, apparently, never moved beyond it.