Joe is a billionaire. He does not have a family, but he loves his cat. He decides to build a house, a very big house, with a thousand rooms. The cat explores a little, but mostly stays near the radiator, the cushion and his food bowl. What did Joe expect? Why did he build such a big house?
There are countless billions of planets in the universe. They are all empty but one. We explored a little, but mostly stay on our one planet. What did god expect? Why did he build such a big universe?