Stephen Crane: "A Man Said to the Universe"

          Steven Crane's short poem "A Man Said to the Universe" starts of with a proud man yelling to the universe. He lets the universe know that he is in fact existent. He does this in a forthright manner saying firmly "sir! I exist!". However, in reply the universe says that he is not moved by the fact the the man exists. Untimely, the world does not care that we exist and does not owe us anything. The world shuts down the man and lets the man know that he is not as important as he thinks he is.
          This poem relates to the naturalists thoughts the world, God and life. The would compare the universe to God. Both being huge and powerful, naturalists believe that there is in fact a God that exists who is big and capable of a lot of things. However their deist mindset leads them to believe that God does not care about them at all. The universe is not affected by man, nor does he care, as well as Crane and naturalists believing God not being affected by man and nor does he care.

Question: Why did they think that he didn't care?