And what would you do with the water you’ve taken out in the drying process? Have seperate organs to seperate it (kidneys, colon) and a seperate set of organs to dump it out (pee)? That’s returning to the way we humans handle it. Or you need to stop flushing things with the water and stop eating food that contains it. Or your organism just accumulates water and explodes like a water balloon if it has no way to get out. It has to go somewhere if you ingest it.