Obviously, I'm not talking about giving every addict their doc, I didn't make myself clear; their are alternative treatments and medications that many addicts respond very well to -bupe for example is seen as a lifesaver by many (including myself), I meant there should be many approaches to treatment, as there are many kinds of addict-for some, it's mmt, and that works very well for them, but I've also had friends who use on top regularly, give a dirty sample and get dropped from treatment, and they run straight back to street dope; the meth just didn't work for them.
Then of course, there's abstinence (NA-style); I've known people clean up for 20 years, and they move past it.Then, of course there others I know who clean up, relapse, then clean up again in a regular cycle. When treating addicts, stability is the goal. As I said, there should be a range of solutions to achieve this; for the minority, being prescribed their drug of choice could be the only way of providing them with stability and a deserved chance at a normal life.
In our diamorphine test pilot, as I pointed out, the vast majority led very healthy and productive lives, according to the study I read. So, I think diamorphine could be a valuable option for treatment, but only if nothing else works. (I personally think it should be a last resort, as this drug is very powerful, not to mention it's the most addictive opiate bar none). Caution is essential here; as you pointed out giving every addict pharmaceutical heroin could be an absolute disaster.