Education isn't based on the premise that they'll never disobey. It's to help them recognize when things become dangerous or are getting to be a problem. Of course kids will do things they're told not to do - this is just helping them tap the brakes and understand how to recover. The attitude that the only solution is perfect enforcement is (in my opinion at least) partially to blame for the lack of self-awareness that makes the more vulnerable to later addiction problems in the first place.

Not sure if this is sarcastic but that's exactly how drug education works in the US. Sure it's optimistic but almost everything about raising kids is optimistic.

when i tell my 15 year old kid not to smoke, he obeys. sounds like a skill issue on your part.