Because different drugs have different effects. I use to use amphetimines to keep me awake and give me energy for all night raves and house parties which would last 2-3 days. Even caffeine wouldn't keep me awake that long, no matter how much I drank. But at the end of the day, I agree with you. Meth is bad and can be unpredictable just like any other street drug. Which is why I stopped using it along with all the other pharmaceutical cocktails I used to consume. I had my fun and it was time to stop. But before that time, no amount of anti-drug hysteria would have done any more than perhaps slow me down a little. I wouldn't have believed it because of all the bullshit anti-drug propaganda that has been spouted by those 'in the know' in the past. Facts beat hysteria. Presenting only the worse case scenarios to people doesn't help the anti-drug cause one little bit, because people can see with their own eyes and through their own experiences that what they're being told is a mis-representation of the truth. So they tend to write off all the information given by that particular source as 'hype'.