Too true. Drugs can be used safely, and I can see why some users in here get bothered by the people attempting to define hard drug use by intervention tv shows haha.
But it's pretty to silly to think you can take drugs and guarantee you're in perfect control of your future. It's always a toss of the dice, some people may have a fairly calculated idea of how they will handle it, but it's a risk nonetheless. Also, "drugs" is a broad term, so don't take this literally and apply it to pot aha.
And honestly, you hit it bang on with the people around you. All my frustration with drugs has pretty much stemmed from how i've been affected by other people's use of them. It can be so fucking frustrating when you have problems because of other's poor choices.