Just because a person can grow their own pot does not mean they will. Growing pot is a full time obsession. I have drunk thousands of gallons of beer but never once did I brew it. Growing good pot is not nearly as simple as burying a seed. There is science and co2 ratios and all other factors. I know first hand. The good is that you always have way more Pot than you can ever smoke and the bad is Paranoia, Ph levels, massive lights on timers, just to name a few.