I'll believe a businessman over a government agency whose daily operations constitute a gross offense to the Constitution and the very idea of law, any day.
Are you asserting that the DEA's operations "constitute a gross offense to the Constitution and the very idea of law"? If so, I think you'd better acquaint yourself with the history of drug regulation in the U.S. and why the DEA exists.
It was unregulated drug trade that resulted in unethical business practices that killed people. And while it is probably true that the relatives of persons killed by poisonous formulations will not repeat business with the lethal vendor, eventually driving unethical vendors out of business, that market model is very unpopular with potential victims of unregulated, profit-motivated drug producers.
Sometimes common sense trumps libertarianism.
This isn't about pharmaceuticals, this is about declaring a plant illegal and using police state methods to enforce it. Need a list of explicit Constitutional rights that are violated by the activities of the DEA?
The FDA regulates the drug industry, not the DEA, but thanks for playing.