And the drugs are not in scarce supply. They are not hard to find. What they /are/ though is incredibly dangerous. Most people taking them are very short on cash because they are hooked on drugs, so the drug is getting in the way of paying for food, housing, and family. And drugs are almost always cut with cheaper additives. Opioids are often cut with wildly addictive chemicals that are 100s or 1000s of times stronger than what users are paying for. Needles are expensive and controlled so they get reused. Uppers are cut with many kinds of other amphetamines with awful downsides and agitation that lasts for days on end. Alcohol is so cheap and available we don’t even consider it a dangerous drug, but those dependent on it will die of incredibly painful seizures if they stop taking it.
So put this all together and what we have is a nationwide mental health crisis being compounded by the fact that the easily available medicine people are using to self medicate is illegal, and that makes it dangerous.
Making all drugs legal is only one small part in solving the problem, but if it was legal we wouldn’t be dealing with homemade meth, fentanyl, relapse overdoses, and death by involuntary withdrawal (i.e., running out of money for the drug you are physically dependent on).
Legalized drugs won’t cause your children or loved ones to start doing drugs, a lack of opportunity will.