They did it and lots of people were dissapointed because it wasn't visable through the telescopes or something.
They are not doing this to the moon so that there will be more water on earth. They are doing it so that they can do missions to the moon without having to carry so much water.
I don't think space exploration and experiments is a waste of money. I think its possible that space holds the key to humanities future, and possibly existence. Its something that can benefit everybody. Who knows what we could find out there.