tomato garden

My dad has this amazing tomato garden. Red ones and orange ones and purple ones and yellow ones. He keeps them plump and juicy with an elaborate irrigation system rigged up to the roof drains. The pipes and tomato plants wind all around the house and into the garden like stringy pumpkin innards. You can hardly breathe without inhaling a tomato. Now my dad's threatening to take out all the drains and just let the rain fall where it may. I think this is a bad decision.