Just make high quality opioids easy to get already. It should be as common as beer. The present system is deranged.
It's a bad idea. Opioids are incredibly addictive. At one point something like 25% of the male population of China 'regularly consumed' opium, i.e. they were addicted to it, and China has always been a country with at least a certain sense of order. Opium is also special, even among other dangerous drugs. It takes over your brain's reward system and makes things you previously regarded as pleasurable as uninteresting…
Given the choice between antidepressants and opioids, I'll take opioids.