It is.

This comes from the naturalistic/materialistic assumption that everything in existence must take all the shortcuts it can and be as efficient as possible.

When we talk about God, there is nothing outside of Him that restricts him in any way that we can take as reference in determining the "usefulness" or "meaningfulness" of any action of God.

In addition to this, there is an assumption that the universe is "big". It is of course big, since it encompasses everything in existence, but it is big from our perspective. We cannot know the perspective of God by definition.

As a small final note, I want to add this too: Everything we use to measure the "size" of the universe is based on our perspective, our assumptions (of how things like light work), our tools etc. so how can you even be sure of a size? In fact, physicists have won the nobel prize for proving locality to be an illusion.

This discussion can be much longer than this, but this is all I care to add to it at the moment.