If pot took thousands of years to form, you might have a point. Since it almost literally grows on trees, this is an invalid analogy.
If anyone can by any amount of any kind of pot for $2./oz., yes, I agree, people will not grow their own. Change any of those parameters, and you might as well break out the grow lights.
I doubt it. A good grow light costs $100 or so. Proper ventilation of an indoor grow space is a pain in the rear as well. There are other expenses incurred in growing inside, and it takes a month or two to finally get your product. Going to the store doesn't. Plus, people seem to like variety and it's hard to obtain that in a small area. In Holland, they sell pot for about $5-10 a gram, and they don't seem to be lacking in customers there, locally or internationally.
LAMPS PLUS Price $7.99