We're asking the wrong question about alien life n equals one means that yes, we are unique in the universe and the the combination of things that gave rise to life is in fact unique and if we want alien life then we should look around us. Look at look at the crows look at the dogs. All of these are alien life, but the n equals one problem means that there is no need to go looking for other kinds of what we'd consider life. We are the life.
Same thing with water rather than fall prey to the the fine-tuning principle or the anthropic principle. Let us see that because the things existed in a certain combination in our atmosphere, they developed in a certain way just as things develop in a certain way elsewhere. Let's let us not forget that what we find outside our atmosphere are elements. Water is a molecule, itself a complex combination of building blocks. So why should we expect it to happen elsewhere? That's why we have as the universe is generated in its patterns. We find these these things like units or clusters and certain things happen in certain clusters. Water and by extension life happen on Earth. They may have once happened on Mars or other adjacent planets note adjacent planets. That should tell us something that we should not think too far outside of our own neighborhood. The things that we see are generally localized, for example, as we had a common ancestor that was no longer with us so too Mars may have had water. We are the common ancestor. We are the we are the evolved ancestor of perhaps more abundant water elsewhere in the universe where the conditions simply were not stable and there we go stable States and unstable States, static conditions and dynamic conditions. These are the patterns of the universe.