While that maybe some of it there is still much more holding it back. Large drug companies pay big bucks for lobbyist to keep it down. Why lose out on all the money made off of HIV/Cancer drugs to a simple joint? And allot of or congress is old.. People who grew up with the idea that pot was bad and a gateway drug. When the generation of people who grew up from the 70's onward are the majority in congress, then we might see a shift in position.