Here's an article that quotes three ( THREE ! ! ! ) studies all showing that when a state allows access to medical marijuana, the rate of opioid use drops precipitously. So access to medical marijuana DECREASES opioid use and abuse. Please read that again.
This is huge. The benefits of marijuana in helping people get off of opioids are so clear that the CDC has recommended that doctors STOP testing patients for THC when monitoring opioid patients.