Is it worth being a RockStar when you no longer feel like one.

Is it worth being something when you no longer feel like that thing. The RockStar is just the title I mean even being a house wife or mailman; when you no longer want to be that thing what do you do. If you're an athlete and the fun of being an athlete is drained and you no longer have that feeling of competitiveness is it still worth it to compete and monotonously go through the motions of competing. I understand that everyone has to make a living doing something and the best of people make it doing something that they love or at least enjoy doing. Isn't a Wino on the street just as content as a librarian. What do you do when you no longer enjoy doing what you've been doing.