Hi Philip, Welcome to the forum!
Glad you asked me this question. I am learning to ask myself similar questions before I start clicking the shutter button. I think doing so will give my photos a clear subject, purpose, or a message that I am trying to convey to the viewer.
If I recall, in this particular scene, I wanted to show the viewer this unusual piano player in the middle of the street during rush hour. I also wanted to add the sky scrappers in the background to magnify the effect. However, I could not move too far back to show more of the street lines or the buildings because there were a bunch of people surrounding the pianist.