That’s not quite what the Anthropic Principle states. For instance, we can conclude from the fact that we exist that the universe is a place where life can exis

That’s not quite what the Anthropic Principle states. For instance, we can conclude from the fact that we exist that the universe is a place where life can exist, and that it is more likely we live in a universe where life arises frequently. However, the fact that we haven’t observed any aliens decreases the probability that life arises frequently.