The only part of what you said that I could agree with is vote for decriminalization. Actually, that's not even the right course, outright legalization is what we need.
From the instant I read your statement "How can you compete with perfectly rolled doobies"; I could tell that you had just watched the documentary, The Union: The Business Behind Getting High. It is a great documentary and I recommend it to anyone whether they smoke or not.
Honestly though, what are you talking about? Anyone can compete with that if they're growing for personal use. However if one is growing to sell, no, of course they couldn't compete with factories making "Perfectly rolled doobies". The "doobie" quote and the examples you gave of dealers buying houses, boats, cars etc. was taken from a portion of The Union, where they were interviewing 2 former growers/sellers. Point being, unless you're a seller, what is there to compete with???? Your statement made no sense at all.
If the government legalized Marijuana, along with that would be hemp, which has a thousand uses. It's a 2 time a year annual crop which can be grown in virtually any state, creating jobs for farmers nation wide, farmers need equipment, equipment needs repairs, the final product has to be shipped, we would add a new export rather than importing hemp, new factories would need to open to process the hemp seeds, hurds, etc.
I strongly advise that you watch The Union a couple more times (maybe sober this go around) and check out a little book titled "The Emperor Wears No Clothes" written by the late Jack Herer. Your vision is blurred my friend. You may think arguments like this will help the cause, but you're actually doing more harm than good.