Actually pot and tobacco are about the same in difficulty. Anybody can grow, anybody can dry it, anybody can smoke it. BUT your quality is based on the seed stock of what you’re growing, how well you keep the bugs away, and how well you dry it (too fast and too slow both have problems). Even booze, it’s actually pretty easy if you’re will to spend the time to do it right. People tend to have other things to do with their time, which is why they buy instead of make.
I have grown pot and my grandmother used to grow tobbacco, she used it for chewing to save money, but she couldn’t make a fine Marlboro, making Scotch or whiskey is difficult and takes a lot of effort.
Growing pot is incredibly easy, it truly is a weed, in fact it can be hard to keep it out of your yard, to feed it and play with it a little gives you great pot.
Pot is easier than tomatoes, when it is legal it will be like cheap weenies during the summer, it will be shared, and gifted, people will show up at parties with free ounces, because the hobby guys and the gardeners will all be competing with each other. There won’t be anything to regulate.