I don't do heroin and it's easy to pick on heroin users. I think the totalitarianism we see today has it's roots, or at least it's proving ground, in the ostracism of heroin users we saw in the 90s and early 2000s. Of course it's best to start with an easy target that is widely reviled, but once it is realized we can repress them, pressure mounts to do the same thing to other groups we disagree with or want to push our agenda on, and we get the current disregard for any personal freedom. This is a loss for all of society, not because using heroin is good, but because personal choice is.
(and that ignores the fact that prohibition doesn't work. Guess what just because the most coveted drug for New Zealanders 21 and under).
I write this out because freedom of choice becomes moot when something directly removes choice through its addictive properties. Particularly when other people pick up the bill for your human imperfections