We live in a world where we create balloons of expectations. We become confident and take everything for granted. The life we are living is very cut-throat, and people are killing others for a few dollars.
The last thing living without expectations will do: it will give you a peaceful sleep, whether things are working in your favor or not.
Our life on this planet is limited. We spend much time socializing and wasting on things that mean none to us. Building castles on others is a recipe for disasters.