Right, I was a smoker for many years, the but the actual conversion rate of "drug users" to "drug addicts" is surprisingly low. The overwhelming majority of people who smoke their first cigarette will not die a smoking related death. And cigarettes are probably the most extreme example.
How many people who try cocaine end up being the poster case for DARE? It's virtually no one. The risk analysis for having fun with drugs is totally lopsided. Society is fighting to keep 100% from using drugs in order to protect the 5% who will have their lives ruined.