i think there are many who would agree. but i think there will always be people saying that opposite that they know someone, friend of a friend, that ruined their life from marijuana.
i am not going to deny the risks involved with intoxication, as there are many things that can happen when in altered states. but i must say that the 12 years i smoked pretty much daily, nothing happened to me except a good body weight (i under eat) and good night sleeps which allowed me to do school and go to work.
living here in taiwan its almost non existent and for 3 years have not done it once, so once again i don't eat for a day sometimes and am up until sunrise gardening or something

most of my friends back home are still smoking and still working living and generally having a good happy (safe) time. but their mental "profile" does not fit the hard drug/junky/need a fix type personality so curiosity doesn't really get the cat.