I'm writing this from California, so I was using "neighbors" expansively to mean Americans in general. My experience in California has shaped how I see the argument. I grew up in the Midwest and heard a million reasons why weed was a ticket straight to hell. Now that I live somewhere that it's completely legal and normal for your average person to possess and use it, I can see that, literally, none of the dire warnings I'd been taught have come to pass.

California legalized weed, people who wanted to use it started admitting that they use it, and... that's about it. Nothing bad happened. If anything, I know people who switched from alcohol to weed in the spirit of harm reduction, and they seem to be better for it.