Yes, the evidence appears to be in, that certain segments of the population go psychotic under the influence of weed.
But that's no reason we can't make it available to everyone, right? What are a few random murders here and there compared to everyone's need to get high?
If anti-pot laws were keeping pot away from a significant percentage of potential murderers, you might have a point ... but there's no good evidence that they do so. What they clearly do is put inflated profits in the hands of violent gangs and cartels.
“But that’s no reason we can’t make it available to everyone, right?”
Sure! Same way we make prescription med’s available. After all, a doctor or modern psychologist knows you better than you know yourself, right? In fact, almost everyone, including the government, knows you better than you know yourself, right? So, when they set out to save you from yourself, just relax and trust them to do what they think is best for you, right?
Yes. And some that drink water become murderers. Ban water. Some people are just idiots.