I come from a place (Jaipur, IN) where weed is legal since a very long time, there are people I've met who are 90 and still consuming marijuana on daily/weekly basis and don't regret about it, I hadn't listen any incident/accident that happened because of weed. neither to folks are underachievers, they are respected professors, artists or daily wage workers. meanwhile, drink and drive accidents are very common here, and consuming liquor is considered a malignant.