Fear of competition and protecting your own profits. Got it.
The fact is, that's where we're already at, except that the stuff is being sprayed with more chemicals to hide the smell, seeded, crushed and ruined, and hundreds or thousands of people are being killed over it. You're pushing prohibition and agri-business and huge corporations are not going anywhere. If you're against commerically produced, chemical-laden, genetically modified weed, don't consume it. Grow your own, or buy from a gourmet organic producer. Prohibition isn't the answer.