This feels like junk science. Quackery.
Not everyone who uses drugs is an addict. To me, these folks who can use then lay it down fall into the "just need a good life" bracket. However, the science done by addiction researchers on humans (not by social engineers on rats) shows significant changes in brain chemistry between addicts and non-addicts that no amount of public art and hugs and rainbows can cure. They are more compulsive, more emotionally disregulated, and are attracted to chaos in ways that non-addicts aren't, frequently showing this behavior before and after the height of the drug abuse, through childhood even.
Having meaningful work, a good life to come home to, and a reason to live is great for all people, drugs aside, but WE ALL HAVE SEEN people with nice homes, good kids, caring spouses, good jobs, nice cars, in safe neighborhoods, completely tear apart their lives due to drug and alcohol addiction. No amount of love and care can cure someone who prefers dope to safety, restfulness and security. This article seems to rest on a stereotype of drugs -- Vietnam vets, inner city ghettos -- and ignores that addiction happens in all walks of life to all kinds of people.