"There is a reason that under current law using/selling drugs is punished: society as a whole might suffer."

Hate to break it to you, but the "war on drugs" was and is really a war on minorities, and a war against alternatives to prescription drugs (among about a half dozen other nefarious reasons).

When I was 12 I would have believed that "drugs are bad and what's why they're illegal" - I'm no longer 12.