If we were not to improve ourselves then it would be problematic for humanity as a whole. Think of the health professionals (such as nurses, doctors and psychiatrists) who, if had not put in their time and effort would not have helped countless people. Or what about Edison, Newton, Einstein, Stephen Hawking each of whom spent countless hours improving their knowledge to better humanity.

On the other hand, you have multi-millionaires who have hustled their way to the top but are miserable and jaded after improving themselves so much that they neglected friends and family. Is it worth it then to pursue of a life of improvement?

Ultimately, the decision to go down the path of improvement and subsequently sacrifice is up to the person. But beware, this rat-race can never be won.