People use weed as a drug, sell weed as a drug, and are arrested for selling/having weed in certain circumstances based upon your location and quantity.
It is a drug, and if you are honestly saying that it shouldn't be considered a drug, that will never be the case until people stop treating it as a drug.
EDIT: Also, please don't bring up that it's used for alternatives such as medication or for therapeutic reasons, because that even more proves my point.