I think you're seriously downplaying a few variables, to reach a desired conclusion. How many coal mines and textile mills are there in Portland or San Francisco?
I'm not arguing against the merits of cannabis, mind you. I'm just saying that it's lazy and ridiculous to argue, "We don't have strung-out hillbillies on the Pacific coast. Must be due to the presence of marijuana! (rather than the absence of hillbillies)".