So, do you live in a country that is notoriously designed almost exclusively for personal automobiles? Whose cities' growth was informed as much by lobbying from the automotive industry as by a desire to use personal automobiles? Do you live in a country where prison sentences are applied in such a way that meaningfully decreases the recidivism rate?
I see by your comment history that you live in Germany. You do understand that even California is considerably less urban than your country, right?
And to be clear, I'm not saying my brother-in-law doesn't need to quit drugs. I'm saying that the in the US's justice system, just putting him in prison until he's clean will just guarantee that he's in and out of prison until he eventually overdoses, all the while dooming his 11-year-old daughter, my children's beloved cousin, to a life of addiction and abuse herself. Moreover, even if he does get himself clean, because of his criminal record, he's doomed to working those same shit jobs, living at the ragged edge of the poverty line, for the rest of his life, because very few will take the risk of hiring an ex-con. Nobody ever relapsed in those conditions, no sir.
Maybe its different in Germany. Maybe getting yourself clean and sober will allow you to live a productive and happy life, and once you've served your time, you're free of the stigma of being an ex-convict. But if the only solution to the drug problem in the US is incarceration, given the current state of prisons in the US, a more humane approach might be mass executions. Which, I recall, Germany has some experience with.