He decided to use first-person narration to bring about a greater understanding of Steve, so the reader can understand how sensitive Steve's life was and how it impacted the way he behaves.
Therefore, by putting Steve to narrate the text, the author allows the reader to have a more intimate and personal view of Steve. This allows the reader to see how sensitive his life was and how it impacted the way he acts.
More information about the first-person point of view at the link:
https://brainly.com/question/13845140