Having a successful career will offer you a lot of benefits and real profitable opportunities. As we live in a world governed by social status and money, working your way up to the top will definitely improve your quality of life. There are many possible reasons for which an individual would desire success.
I guess one of the reasons is that maybe by being successful in your professional life makes you feel better among other people. It offers you a feeling of security and accomplishment. Many people who went from zero to a successful career have reported that their lives were improved in almost all the aspects.