Yes, actually.  I've known some drug addicts well.  Some too well.  But despite the horrors I've seen, I don't think any addict is better off because of prohibition.  Quite the opposite.  
But I'd rather talk about another addict I knew well.  No law tried to save him and I doubt any could have.  In his last years, my father drank himself to death.  Like any addiction, alcoholism is complex beast and he'd been that way for many years.  But toward the end he'd gone to a whole new level, drinking as never before.  I'd like to say I'd have done anything to save him, but there was nothing I could do.  Perhaps turning South East Michigan into a prohibition police state with the rotting corpses of executed bootleggers lining every road would have done the trick.  But anything short of that would have just caused him to drink black market booze.  
I'm glad he didn't have to.  It hurt me deeply to lose him like that, but my Dad was a good man.  Why should he have been forced to risk arrest or blindness from a bad batch of wood alcohol?  Why should his neighbors have been forced to suffer a return of alcohol prohibition and the Purple Gang just to protect him from himself?  
No, of course you don't give guns to kids.  Children need to be protected and every parent knows part of that is protecting them from themselves.  But children and adults aren't the same thing.  No good comes from treating all of humanity as children.  That's exactly what prohibition does.
If you're my friend and you've let me know that you've quit drinking but you're having troubles with it, I'm not going to bring a bottle to your house.  Sure, I'll give you a hand protecting yourself from yourself, but you're a grown-up.  I'm not going to suffer the death of freedom in my world to keep you on the wagon.  That's on you.  
My plea to every opponent of legalization is to please accept that you just can't protect people from themselves.  The determined will always find a way around your protection.  Instead, let's protect people from the things they have no control over.  For many many millions of us it's prohibition itself, with its militarized enforcers, its overflowing prisons and its dangerous crime that we really need to be protected from.