More control over the product. You can grow "clones" of a plant which effectively make them identical to each other but if one gets more light, more humidity, l

More control over the product. You can grow "clones" of a plant which effectively make them identical to each other but if one gets more light, more humidity, literally just about anything, it can alter the resulting trichomes and terpenes. By controlling more variables you can have a slightly more reliable product. And people can get very picky about their weed.