'a person getting it for pain has processes in their body working against problem use'
Pretty sure not an insignificant number of addicts started from a point of needing medications for pain. Not sure exactly what pain mechanisms prevent/ inhibit addiction or dependence, but I imagine you have your sources. Just as being a drug user or drug dependent doesn't mean you don't have legitimate issues, having pain and chronic issues doesn't mean you can't be a legitimate drug addict. The general you, not the specific you of course. I certainly can individuals not having issues with addiction while being exposed to massive amounts of drugs, but practical guidelines for a general population may differ. A sizable minority with significant harms has weight. Can't hear from the dead ODs themselves, also. I know it is difficult when people have very damning health conditions.
Drugs were addictive before they were prohibited- that's why many drugs were banned and regulated, in an attempt to limit some of the effects and deaths. Look at some of the history of initial and international drug control efforts. Now whether the regulation and bans were actually effective (not) and are the appropriate solution to drug addiction (likely not, as they are), doesn't mean that drugs aren't addictive. Certainly legal and economic issues stemming from prohibition are a major issue and have exacerbated the problems.
There is an argument (not sure that I fully agree with it, but it is interesting) that Prohibition in the US was actually successful in cutting down the overall population harms in alcohol use and changing habits of use. Even though it was repealed it generated some change and brought awareness. I digress with these tangents.
Delineating physical and psychological dependence and addiction in humans in realistic clinical situations still appears to be an inexact science and prominent area of research (as the experts would certainly attest to, so they get their funding for more research...). What qualifies for self-destruction or impact can be tricky to judge in determining what would be possible with or without drugs and conditions as they are. Especially with reported measures and patient-driven accountability.
A life stage perspective is necessary for development of age-appropriate strategies to address substance use disorders (SUDs) and related health conditions in order to produce better overall health and well-being. The current review evaluated the literature ...
www.ncbi.nlm.nih.gov
Strong associations exist between substance use disorder diagnoses and 19 major medical illnesses among patients in a large, integrated health care system. The study indicates that these associations may persist even in health care systems that provide specialized treatment for substance use...
www.drugabuse.gov
Not a great journal
As for the topic- receiving those drugs at high doses for a 10-week stay for pancreatitis seems within medical scope, and there would be significant harm in not treating such a condition appropriately (say, in fear of causing addiction or dependence.) I worked and work for health systems with orthos, rheums, and pain management practices that had a few lawsuits (America, of course) along those lines. [Not directly involved, I must say, though they were certainly a topic.] Generally it is a difficult bar to pass for a lawsuit with legitimate medical reasons with or without a history of substance abuse, barring other incidents. I want to ask my health lawyer friend about it actually. Now some PCPs/GPs/Psychs have gotten in trouble for overprescribing, but 360 oxy 30s with 120 somas and some valium for an initial back strain (m54.5) might not fly anymore. Standards of physician education and drug awareness have changed since even 5 years ago, so the bar has changed.
Now if you got those drugs for your wisdom tooth and were encouraged to take it with refills (somehow) when they knew of your addiction and put you in a compromising situation, that might be a little different, haha
Edit: I apologize for the American side in EADD, I misread the forum but I'll leave it up there.