That kind of thing is an extreme minority in most places- weed culture is no less mercantile than any other. The la la stuff exists, to be sure, but so does my neighbor offering to share veggies from their garden. Either way, I don't think it's got much bearing on the illegal drug trade, or the crippled legal trade as the volume is just two completely different scales.
In my experience there's quite a bit of overlap between the kind of people who like to smoke weed and the kind of people who like to grow their own vegetables and sell them from their garden. Perhaps less so in cities. I think this is one of those stereotypes that has quite a bit of truth to it.
For example, my mom loves Whole Foods and would not prefer a CSA. There is comfort in the standard quality that McDonalds has to offer. Marketing labels and branding have become commonplace and widely celebrated amongst consumers.
To ask for these luxuries to be stripped away is preposterous to most people. “Your weed isn’t lab tested - but you could be killed!”