I just thought it was funny. I agree most people would grow their own but as a cash crop it is actually important to BC's economy.

http://www.theglobeandmail.com/news/national/british-columbia/legalizing-pot-the-billion-dollar-repercussions/article1779071/

The marijuana trade is one of the largest – if not the largest – industry in B.C., generating around $4-billion in revenue annually for at least the past seven years. Domestically, marijuana sells for about $2,000 a pound.

About 70 per cent of marijuana produced – about $3-billion worth – is exported to the U.S. The price of B.C. Bud increases as the distance from B.C. grows – it sells for $2,500 a pound just south of the Canada-U.S. border but can go for as much as $5,000 a pound in San Diego. And at least half of the exports to the U.S. go to California, sales that would be lost if legalization occurs there.