I think you’re on to something here... No critical thinking is being taught. Having said that I can’t get behind legalization of other more destructive drugs(and I know what I’m talking about from direct personal experience)
One more time. It's not about whether marijuana should be legal, it's about who has the authority to say whether it is or isn't.
If Wickard v Filburn was overturned, and all the federal laws based on it were rendered invalid, marijuana would still be illegal in your state, by state law. Federal agencies like the EPA, on the other hand would just be flat out of business.