Yeah, you can tell because everybody grows their own Tobacco.
This assumes many things that are inconvenient to that argument. People are lazy, and regular smokers more so than many. It is far easier to hit the store and buy some MJ candy (so you don't bother the neighbors with the smell) or a bag and a vapor pipe (another way not to bother the neighbors), or you can go to the restaurant that laces the food with it...
There are many, many ways of ingesting this stuff. It's silly to assume that people wouldn't sell the products or that the generally lazy population will be growing MJ plants in their windows...
It's cheaper and you don't have to pay sales tax if you grow an herb garden in your windowsill, yet there are shelves of herbs that are easily grown at the grocery store. It's cheaper and you don't have to pay sales tax to grow your own vegetables, etc. People don't want to do this stuff, and the product that they can buy is usually of far greater quality than they can produce on their own.
