I'm glad I have seen a side of life most will never see in their lifetime. In some instances, sure, the family did everything they could to enable their behavior... but in others, the family showed tough love and still ended up with a dead child.... and then you read names in the headlines and never hear the horrible and unimaginable circumstances they were dealt with growing up...
And just as an example, think of how you might have turned out if you witnessed your step-father kill your mother... or how you might have turned out if you were pimped out for money to support a drug habit of the parent. Or what if you were always left at home to care for your younger siblings and had no clue what the hell you were doing - maybe even left without a can opener (a lawyer I know was put in foster care after he stabbed himself in his leg trying to open a can of beans for him and his siblings while his mother was on a 4-5 day drug binge)
Now some people can be raised in the worst of circumstances and have a steady persistence to become something better and that's great that they were able to have some thread of self-esteem left to work towards something better. And some people were raised in a very loving house and still turned to drugs and crimes to support their habit. But if I had to put my nickles and dimes into a method, I would choose mental health treatment. People don't turn to drugs because everything was functioning well upstairs so until they deal with that... they will never be able to control their drug addiction, JMO.
And trust me... I could go on and on on this topic but won't 'cuz I know there are no easy answers.