Because the Thousands Standing Around would be forced to admit that the liquid "ban" was theater that did ABSOLUTELY NOTHING to protect you?????
We can't bring through a sprite, or a diet coke but you can pour any clear liquid into a 12 oz bottle of "hand sanitizer" and bring it on.. Theater is action!
After all if you work for the airline or airport you can bring ALL the liquids you want through the checkpoint because none of them would ever do anything wrong would they?
(Oh wait.... one of the original "liquid bomb" plotters??? Worked at the airport LOL!)