This statement is 100% false. Pot does not have ANY physically addictive properties like tobacco or alcohol (much less so than tobacco). I do smoke occasionally, having started at twenty years of age. I do have a somewhat difficult life, what with working full time to afford my apartment, and education, as well as have a social life. Stoners are not all lazy screwups with emotional problems, any more than people who enjoy alcohol are. I cache and camp, while maintaining my personal, educational, and social life just fine without having become some terrible monster that you seem to think pot smokers become.
Alcohol and tobacco are much worse physically for you, with alcohol being much more dangerous both emotionally with a much higher chance of injury, death, or illegal activities being performed when drunk as opposed to stoned.
Drugs are pretty common in high school, so I can't say that I was never exposed to it as a youngster, however, as a kid I rejected it. After my twentieth birthday I pretty much did decide one night "hey I think ill go get stoned".