First, it's fresh, drinkable water, delivered to people who need is, is precious. Not just "water". Second, 7 billions of people who drink and bathe and eat wat

First, it's fresh, drinkable water, delivered to people who need is, is precious. Not just "water". Second, 7 billions of people who drink and bathe and eat water-dependent food every day and a space mission with a few tons of distilled water every now and then are on completely different scales.