I think people in this thread are asking you to question your assumption- do you think every drug addict on the west coast wants to hold down a job and live our normal life?
Non-addicts don't. Addicts do. Addictive people are stuck in the middle oscillating.
Free will + mind-altering drugs is a fundamentally hard problem.
People don't want to live like drug addicts; but nor do they want to stop using drugs.
To reverse the timeline of an obvious example: the people on the street addicted to heroin, would much rather just become people working regular jobs who are prescribed heroin.
These people probably they got addicted to heroin because of chronic pain, and probably that chronic pain hasn't gone away. So any time the heroin is wearing off, the pain comes back, and that decreases the amount of energy/willpower they have to do anything besides the simplest, shortest-term thing they can do to stave off the pain: buy more street heroin.
You might wean them off heroin, but you aren't gonna make them not take some painkiller, because they still have chronic pain. They'll always be "a drug addict" in a technical sense; they need painkillers the same way people with diabetes need insulin.
That's not the relevant question. Is it better for the rest of us if that drug addict is on the side walk or living inside? In the latter case, there's a better chance of treatment success, but it's also better when they remain addicts.