If life is exactly as it appears to be, then one would expect life to be more easily defined — the answers of life should be in plain sight. But, life seems to become less definable the more it’s examined — alleged answers only lead to more questions.
Therefore, life cannot be what it appears to be simply because its appearance defies definition — life cannot be accurately described. Ask a hundred random people what life is, and receive a hundred varied answers. If life was obvious, we’d all have the exact same answer, over every generation. But, even our own answer changes over time.