Actually, I've read somewhere it's actually the opposite. some space scientists actually half expected that we would have found more than just one planet with living creatures by now.
I forgot where I read this. I would be grateful if someone could give me a link.
Oh, and I have a feeling we will end up claiming a part of the universe as ours. Solar systems will just be like districts once that happens

Yeah I think our science haven't explored and studied all of universe yet, but just one little part of it. So, they just made books or articles about the little part