I got medical marihuana for my constant migraines. A sufficiant dose to be effective for the headaches made me high as a kite 24/7. No pause, no sobering up in between. No way to function as a human being any time of the day or week or month.

After trying around with several different strands, dosages, applications for months, I gave up and rather live with the pain. At least I can be myself sometimes.

Otherwise your suggestion is absolutely valid. There are plenty of chronic pain patients that become addicts to one thing or another because of that.