You sound like fun at parties.
All the crazy fuckups I've known or met had waaaaayyyyyyyyy bigger issues than cannabis. Correlation does not equal causation. Alcohol off the top of my head is so much worse and causes so many more problems in the world. With other drug/alcohol abuse, personality disorders, and just people being dicks, cannabis use is so far down the list it's not even worth mentioning.
If cannabis use is not your jam, that's fine, but I don't believe at all it's the main cause of many "people destroying their lives and futures". If that's your take, there were likely many issues hidden from you.
I feel sorry for people who think "it sucks" and is evil. Peace and good luck to you, Vert.
Edit: You know what,
@vert , on second thought who would come to a thread talking about cannabis and music to post what you did? I think you are a sad person who is either a troll and/or suffers from one of those personality disorders I mentioned.