Complete BS. Why do you think the government didn't regulate alcohol under the Commerce Clause, but instead passed a Constitutional amendment. (The answer is obvious: they FOLLOWED The Law for alcohol, and BROKE it for other drugs.)
The Controlled Substances Act is NOT Constitutional! Anybody who can actually read the Constitution (and the supporting material of those who wrote the Constitution) should be able to see that. Or else they need a remedial reading course.
Of course its constitutional. If it weren't, it would have been overturned long ago. Not every law you disagree with, is unconstitutional. I believe Roe v. Wade is unconstitutional. So far my side has had no success turning that decision around in the USSC. The same is true of the Controlled Substances Act of 1970. You can moan and groan all you want, it will get you nowhere.
Anybody who can actually read the Constitution (and the supporting material of those who wrote the Constitution) should be able to see that.
This is very easy to understand. The Constitution is the only lawful document, that guides the Congress in its law making and governance of the USA. There is no supporting material written by anyone, that is considered part of the Constitution. Period! No Federalist Papers, NO papers of Thomas Jefferson, NO papers of James Madison. Nothing!!! The Constitution is a stand alone document, from which all subsequent written law is based on.