Maybe you simply lack the fortitude to see things through.
I simply believe that people should be free to do whatever they want with their lives, so long as they aren't hurting anyone other than themselves. Dale Earnhart wanted to spend his life racing cars. That was his choice. And oh shit, it got him killed. But so what? That was his choice to take that risk.
I'm also a realist. Trying to save people from their own self created demons is always a losing battle. We are keeping drug use alive and thriving in our society by trying to save people we can't be saved by anyone other than themselves. Society is made stronger by letting people kill themselves with drugs than it is by trying to save lost causes or trying to stop people from doing drugs by threat of force and punishment, on the false premise that making people suffer will result in compliance with arbitrary moral standards.
Start handing out heroin like candy, start letting people drop like flies, and that's the kind of shit that will shock society into reforming itself, while also weeding out the weak elements of the herd. Within a couple years even trying heroin one time will be synonymous with instant death and
nobody will want to ever pick up the habit.