Addiction is a phenomenon that predominantly happens in the brain, due to it constantly adapting to find homeostasis. And being unable to perceive pain when you should be is not homeostasis.
source: Am heavy opioid user
But the point is, whether you're addicted or not, you cannot stop taking the drug. If you stop alcohol or smoking you might experience light to severe withdrawal symptoms depending on your level of use, even hospitalization. With opioids you will experiences months of crippling pain and inability to eat normally with the only remedy being more opioids. And you might not even know it's the opioids doing it because the doctors give that garbage out like candy and don't warn you about these side effects.
Wouldn't be very different to opioids or painkillers; just different mechanisms if action for similar phenomenon
> What’s especially neat is that the stimulated brain region normally doesn’t generate any sense of euphoria, the downfall of opioids. This means it’s likely to decrease the chance of addiction. And because the system only stimulates the brain when it detects pain signals, it lowers the chance the brain adapts to the stimulation.