Kids didn't listen to it, but it was right. It painted weed and harder drugs as pointless and dangerous, which they are.
It painted weed as something that if you took a single toke you'd end up shooting heroin shortly after.
The hyperbole, similar the parent comment insinuating that smoking weed is a guarantee of a shitty life, is ridiculously counter-productive.
If used in ways that doesn't affect someone negatively (and here is where the danger, education, and respect part comes in) it can provide life experiences that you could never, ever have by being sober.
Doesn't mean that a sober experience is subpar, it's just different, and it's ok if you want to live that way but it's not the only and "right" way to live a life.