There is a book by the geologist Peter Ward and the astronomer Donald E. Brownlee called Rare Earth: Why Complex Life Is Uncommon in the Universe. They make the suggestion that life is so low in probability, so difficult to attain that it would actually be a reasonable conclusion to think that there is life only here on earth in this entire universe. This is a bold statement considering there are about 10^23 stars in the visible universe. Additionally I remember reading a paper published from Nature in 2010 (can't find it now) that stated that the probably that life came to be here on earth multiple times is almost zero and everything containing DNA had like a 99.99999% chance of originating from the same life source according to different statistical analysis (like Bayesian analysis which is what we commonly used in our lab).
The argument atheists have that the universe is not fine tuned is this " HA! Life only came up here on earth, how is that fine tuned? The sun is gonna blow up in a couple billion years, and there is no life anywhere else, how is this universe fine tuned"
That argument is simply neglecting to answer the question of why the universe is fine tuned to allow life on this planet. Just because saturn and uranus aren't fine tuned to contain life doesn't mean that the earth is not. Additionally, if life just magically appeared on a bunch of planets and moons atheists would say "aha! life isn't so rare, see!" This is much like the "universe is eternal there is no need for god" which turned to "oops the universe was created just like abrahamic religions said, still no need for god if I cover my ears with my hands and scream 'there is no god, there is no god' over and over again."
Both chimps and humans share about 97% DNA together. However it is also true that a pool of mud contains the same material as a human brain. Both a watermelon and a jellyfish are made up of over 90% water but are very different things. Humans are the only animals that know that their time is limited on this earth, that can see far into the past and far into the future. The human evolved to be hunter gatherers. There is no reason we should be able to learn that the world is round, the speed of light, and Einsteins field equations.
The three big questions that have been around since 2000 years ago are still around now. Science hasn't answered them. They are "why do we exist rather then not exist? What is the purpose of our life? What happens when we die?" The answers to those three questions are still "don't know, don't know, and don't know." Even Richard Dawkins admits that when it comes to the purpose of life and we rebel against our genes that work against a Darwinian process. Every time you use contraceptive you are doing this. When it comes to what happens after we die. Atheists like SiroMar say nothingness. The same that happens when you turn off a computer. There is no reason to believe that there is an afterlife. SiroMar is the caveman 10,000 years ago who did not believe in the outside world outside of 2 miles from where he was born because he had no reason to.