The ideal economic models are great, people were pulling those out in the 70s when Carter was presdent. What happened? Reagan. There are tons of variables and annomilies. Culture is a big one, so is politics.
Someone mentioned that people will only buy what they can afford. This is very true. Plenty of blue collar folks will only want something that will make them feel high, regardless of color, taste, or name. This is your Coors and Bud crowd. American is essentially a corporatized fascist-leaning republic, not a democracy. Lots of economic kinks can and will be added to the system. Taxation being only a small one. Lots of anti-competative practices to keep the big guys in charge. Ever seen Beer Wars?
However, unlike beer drinkers, many cannabis consumers distrust goverment and large business. Goes with the culture. Alcohol prohibition lasted only a short turbulent period. Cannabis prohibition lasted 70+ years and lots of people have lost family and friends to the "War on Drugs". Even here in CO, I've casually met at least a dozen patients that are begging me to sell them small amounts after finding out what I do because the dispensaries don't cater to their needs, only their own profits. Big corps don't care about true quality, they care about profits and their customers' perception of quality. They WANT to make it unfeasible for the basement grower to make a dime growing quality so they don't have to. If they can control the whole market and the perception of quality, they will have it! But for the time being, too many of us grew up smoking quality that they will struggle to reproduce profitably.