That's what the article said: (from the 4th paragraph) When medical opioids are taken as prescribed, addiction is rare. Many physicians believe opioids remain, if anything, underprescribed, given their relative safety.
I know I had no problem stopping my pain meds after back surgery, but I was pushing that button on the limited self dosing IV machine pretty often there at first. Then I stopped doing it, and pretty soon they took away the machine.