Cool story, I know tons and tons of people that smoke weed and are leading full and successful lives.
Just like I know lots of people who drink a lot and lead normal lives.
But I know people who smoke weed and do nothing with their lives. They live to get stoned.
And I know people who drink a lot and jepordise their family and life.
Look, alcohol and weed are similar in the way that they can both ruin lives. And usually marijuana more because it's (a) not educated about in schools properly. (b) you can get loving weed anywhere. There's no age limit.