I'm not sure I understand your point. Are you saying meth is "not that bad"? If so then you and I must be reading different newspapers and watching different TV channels.
I think his point is that (a) it's hard to say meth is that much worse than other hard drugs like heroin or crack, and (b) over-the-counter meth that's of a guaranteed potency and without adulterants might not be as harmful to the user as the bluish, vinegar-smelling stuff your second cousin Skeeter cooks up.
thats exactly what he is saying. Relative to some illegal substances, meth is not worse or somehow more heinous. Part of the problem when many talk about the legalization of drugs is the inherited biases one acquires from paying attention or taking at face value what sources like the media or government say about these substances. The problem isn't that certain substances are much worse than others, it's the fact that these substances (harmful or otherwise) are relegated to the black market.
Your drug knowledge stems from newspapers and TV shows? No wonder you know nothing about them.
In fact, methamphetamine is prescribed by doctors for serious cases of narcolepsy, under the name Desoxyn.