If the most important thing in the world is trustworthiness, the most despicable thing you can do is abuse that trust. Hear me well, to abuse one's trust not only harms your reputation, but causes you to adopt a lifestyle that will push you into a corner from which you will never escape. We never fight others and risk our lives over money, power, or even something as simple as having your seat taken at the theater or the bus. Fighting is truly a fool's game, only idiots bother with it.
Those who want to do drugs are free to do it. Individual freedoms exist. Those that want to die have the freedom to choose how they die. But! There are people in this town who sell drugs to children, and you can't forgive that.
Making up your mind to move forward on your own wish isn't that difficult. It's easy to believe in yourself, after all. But trusting in someone else, taking action, and sacrificing yourself are things that require a tremendous amount of courage.