Why is "I had never seen our neighbour from this angle" relevant with repsect to the theme or symbolism in this book?

Theme of Perspective

At the end of the book, Scout escorts Boo Radley back to his home. After Boo closes the door, she turns around and surveys the neighborhood from his perspective. She imagines how he has witnessed all the happenings of the recent years, including her and Jem running by the house on their way to and from school, her childhood Boo Radley games, Miss Maudie's fire, the incident of the rabid dog, and finally, Bob Ewell's attack. As she steps into Boo's shoes, Scout gains a new respect for his life, and understands that his experience is just as valid as hers. With this understanding, she is humbled.