I think the main argument is along the lines of "If people could get [amphetamine/cocaine/drug of similar effect but better safety profile] legally and cheaply,

I think the main argument is along the lines of "If people could get [amphetamine/cocaine/drug of similar effect but better safety profile] legally and cheaply, they wouldn't be using random shit whose number-one design criteria was sidestepping the Analog Act" Obviously those other drugs are still harmful, but at least we have the benefit of research into their nature and specific harms. And DARE classes would probably be a lot more effective if they focused on which were the least bad.