Then according to your thinking, we shouldn't have spent all those years in English class reading Shakespeare, Salinger and all of the other great authors just because they're books!?!?
Hamlet was just a disgruntled guy and we should take that at face value??? Michael Corleone was just a guy who took over the family business and had a lot of people killed???

The Godfather is a modern day classic, and the analysis of its characters and digging through the complexity of them is where you get the appreciation of how great the book actually is.