I don't think your sister's experience is typical (though I am sorry to hear of it) -- check out the statistics for buprenorphine maintenance: most people using bupe do stay clean, and don't go on to sell their script for other opioids. On the other hand, with "traditional" rehab, rock bottom or no, it's literally about one in fifty who manage long-term sobriety. [links removed to test]

I also believe you may be living in a "lucky" area for addicts, since for most of the country there are not many, or sometimes any, programs like this. Suboxone/buprenorphine doctors are extremely hard to find in most areas of the country -- they're limited by law to between 30 and 100 patients, depending on their license, and they are also extremely expensive due to insurance company shenanigans and/or simple greed. Most addicts cannot afford to drive 100 miles every month to a doctor who charges $100 every time, and the medication itself can be upwards of $200 a month; for most of the poor, insurance-less junkie population, it's less that they don't want a way out and more that it's just not open to them.

(That said, I certainly agree that you'll always have people who just aren't satisfied to feel "okay" and always chase the high. It's unfortunate -- I can really sympathize with them; once you taste euphoria, of course you're going to want it all the time -- but for these people, help is a very difficult thing.)

Finally, note that the person above you seems to be talking mainly about maintenance programs that provide full agonists, rather than a partial agonist like buprenorphine -- so even addicts who "just want to get high" would be fine on the program. Contrary to the idea that they'd just be a population of people continually "high off their ass[es] causing all kinds of dangers", it seems that [links removed to test].