To you and parent's points: I think Harari dwells on the this distinction so much because one "model" can be changed, and one cannot.
The whole book is a cry for people to understand that most facts of life stem from the stories model, not the physical model, and hence are to some extent under our control.
The whole book is a cry for people to understand that most facts of life stem from the stories model, not the physical model, and hence are to some extent under our control.