If norml folk could just meander down to the local store and buy it legal, I wonder if many would bother with growing it?
I can brew my own beer (of somewhat decent quality) but beyond the attraction of doing it myself, I can buy better beer at the liquor store.
Of the numbers of new people that would start using marijuana I don't think many would bother with the trouble, time and expense. For those that do buy now without a medical recommendation, I can see them dumping their local channels to buy a product of consistent quality from a known commercial source.