I'm all for ending the drug war as we know it, but I don't find this kind of thing helpful. Is a very technical way, he's right: the overall picture of what drugs are and what they do and why some are judged "bad" and others not is a nuanced, historically literate view. And almost completely irrelevant.
Being high on meth is a completely different phenomenon than being stimulated into wakefulness. The former can cause people to do really stupid and dangerous things, not to mention the physical destruction it wreaks on the human body. The two are really incomparable in practice. IMO, policy arguments out to focus on the ill effects of the "drug war" itself, not the technical equivalencies between drugs to which most people will not assent (including me).