The possibility of life can be so small that the size of the observable universe is completely dwarfed by it. We might just be a freak occurrence. In fact, our current understanding of abiogenesis points that way.
Polymeric structures created from nucleotides is a random process, even under perfect conditions, and to create big enough structures for even the most simple of self replication abilities requires a few hundres nucleotides linking up perfectly in a certain way at a certain time and those odds are VASTLY smaller than the universe is large. It's like shuffling a deck of cards and make a guess in which order your cards will come out as. You have 1 in a 8×1067 chance of being right, a number FAR FAR FAR bigger than all the planets and stars in the observable universe. And that's only with 52 cards with the only condition of somebody shuffling them.
Eugene Koonin, who is the biologist with the highest h-index in the world, has an interesting
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1892545/ paper on it.
