Marijuana is different from the other drugs and alcohol: it grows like a weed, it does not have to be processed.
Unless it’s being processed, sold, or used fraudulently or to cause harm of another person, what business does the government have in noticing it?
What business does the federal government have regulating any drug? Drug regulation is the province of the states or consumers. Do you agree that the Feds are perverting the Commerce Clause as justification for the war on drugs and that it is unconstitutional? The FDA and DEA are tyrants using our constitution as toilet paper to wipe their overpaid butts.