I would say I hope the oak tree is always half full of half empty with rum. As long as it stays consistent Even as I drink it I care not whether one considers it half full or half empty. That argument would be trivial considering that either way I would still be able to drink my desired amount of rum without interference from the Oak tree or it's routes. If the Oak tree was filled with water I would probably smash it in disgust. or saw it into smaller sections to burn for warmth depending on if it had the physical properties of a hey there I'm made of wood like pinocchio Oak tree or more of the look at my shiny glass ass cup over water.
Maybe what it's trying to say is that we're all fake people and that if we drink the water, we like pinocchio can one day become a real boy.