Just like any industry, people accept it because it's just what happens. So busy being a business owner that you cannot afford to be Sheriff.
If there's a zero tolerance policy against drugs there should be a zero tolerance policy against people providing bogus care for drug addicts. Just like you can judge a society by how it treats its weak, you can judge it by which crimes it pursues vigorously and which ones it lets slide.
Unlike the bank robbery case, it gets difficult to tell the difference between incompetence and intentionally crappy care. Nobody accidentally robs a bank because they were poorly trained.
This makes it harder to have a government policy of charging everyone with a felony that provided poor care.
I was watching an old George Carlin video on the death penalty yesterday. He was ranting about how folks want to expand the death penalty for drug dealers. His bit was that you should expand the death penalty for the bankers who launder the money and the drug trade would pretty much stop immediately.