On this question I like the Fermi Paradox. Also, God can do whatever he pleases and wherever he pleases he can create life or not and keep it exclusive to earth. There is just no hard evidence of life anywhere else in the universe that we can explore. Just lots of conjecture and probability.
How do you detect something that is beyond the range of your instruments or ability to contact?
It could be that the distances can never be overcome, but that isn’t proof that life elsewhere doesn’t exist.