your absolutely right bullfrog, but only on outdoor crops, indoor grown is controlled by original seed stock, cloning, enviroment control,and the care provided by the grower ...and like anything else you gotta know what your buying if you do...theres scammers selling this as like anything else. theres different strains of marijuana, and differnt strains are better for different medical needs...indica is better for inflammatory conditions, diabetes, and the treatment of cancers, sativa strains are much better suited for mental disorders, depression,etc... the calming, sleep inducing effects of indica strains is a plus also in that rest, and sleep are a fundamental part of your bodies healing... up to 90% of a bodys major healing is done during sleep.