Often we wonder why some people work harder for success than others. There is a reason. They want it more. Well some may say that's still unfair, I mean why do they who care more have to also work harder and even face more setbacks? But it makes perfect sense. Because as Emily Dickinson said
"Success is counted sweetest by those who never succeed"
(But of course never is not to be taken literally)
Only those who have earned it can truly enjoy the fruits of success. It won't feel right till you have worked for it. The feeling of self satisfaction will not be there without that. Success may not even be appreciated at times if one doesn't strive for it, knowing its value.
It's like a walk. You can either uphill and then downhill. Or you can walk the plain road, no bumps but no excitement either. To each, his own.