When it comes to why writing verse, making music, putting some strokes on a canvas, constructing a photograph, or whatever else amounts to creating this weird and mysterious thing called art, when it comes to why any of this makes a difference, Kurt Vonnegut (in his novel Timequake) nailed it:
Many people need desperately to receive this message: “I feel and think as much as you do, care about many of the things you care about, although most people do not care about them. You are not alone.”
Happy birthday Kurt, wherever and whatever you are. And thanks for your company.