It's kind of funny how philosophy is the only topic that gets this kind of analysis. What is the purpose of music? Perhaps most famously (after philosophy): what is the purpose of astronomy?
“Tiger got to hunt, bird got to fly;
Man got to sit and wonder 'why, why, why?'
Tiger got to sleep, bird got to land;
Man got to tell himself he understand.”
Funny and kind of expected, right? Like how much time we programmers spend programming our environments?
Of course philosophy wants to argue it's purpose. Musicians could write a symphony to explain music, if they felt the need, and astronomers could draw a detailed map of astronomy and explain how fast the different sub fields were diverging based on their red shift and parallax calculations?