You don't compare the relative scale of a glass of water and all the almonds in Fresno County because the water isn't fungible. You could stop growing almonds

You don't compare the relative scale of a glass of water and all the almonds in Fresno County because the water isn't fungible. You could stop growing almonds all over California right now and that isn't going to put any more water into Hetch Hetchy for drinking by San Franciscans.