Has anyone ever heard of a juicer? How about a centrifuge? When you grow your marijuana at home, and then juice it, and then use the centrifuge to separate the oil from the water, where's the market? It's all do-it-yourself. If you don't want to DIY, there's a neighbor next door or a couple houses down who will do it for you, cheap.
It's what I have been telling you all along. Don't legalize it. Simply repeal all laws against it. Why? You might be able to go to a store down the street and get it, very cheap. But why pay for it at all when you can DIY? Government will still get you for DIY.