[tchaffee]

That's called confirmation bias. The people who are living fulfilling and successful lives using meth, cocaine, wine, tea, or marijuana do not advertise it and therefor you have zero information about how many of them there are. Well people do talk about the legal and socially acceptable ones: wine, tea, and increasingly marijuana. So until meth becomes both legal and socially acceptable, your anecdotal data is heavily skewed towards those who crashed.

With that said, meth undoubtedly has a higher potential for abuse and addiction than marijuana and is worse for the health when abused. But evaluating just how much of a difference is near impossible while it remains illegal and while there is an huge and profitable government funded industry around the war on drugs.