Children are tought 'life's not fair' to prepare them of the disappointment of injustice. Why do humans have an inherent prefernce for justice? Where did this bias come from?
Maybe the meaning of life is like this- just as there is no inherent justice to life, it is better to do your best to be fair and just; likewise, there is no inherent meaning to human life, but it's advisable to live your life with meaning. I'm not sure why it's better; except that humans are just happier that way.
And why do we have an inherent expectation that life will be fair (or just, or meaningful)? Furthermore, we continue to be surprised and disappointed when life does not turn out the way we expect. When experience proves otherwise, why can't we let go of the expectation that life is fair?