Whether it's a "gigantic" waste of water depends on what those figures mean. It's very important to understand if 25 million liters of water per year is a gigantic number or not.
For comparison it's about 10 olympic-sized swimming pools worth of water, doesn't seem very significant to me. Unless you're going to tell people they're not allowed swimming pools any more because swimming doesn't produce enough utility?
And at any rate, water doesn't get used up! It evaporates and returns to the sky to rain down again somewhere else, it's the most renewable resource in the entire world.
Yea but it's not like those people have never seen water. And yet it's not so simple, that you can use water but the water eventually comes back to you. There is a hell lot more nuance to this.
