What is the reason for the authors choice of a young narrator in To Kill a Mockingbird?

to show innocence. that is a big part of the book because if you read it in a grown ups view you would wonder why is this grown person making these mistakes. but from a kids point of view everything is new. when reading the book you understand that scout doesnt understand manners and how to be ladylike. because when you read a book from a kids point of view it is mostly going to be about them still growing up and learning. because they dont know any better. when a person is innocent you have more of a feeling for them. and we can almost all relate to the innocence of a child because at some point we all were.