We can disagree on that. My take is that God / author wants to tell a story that shows that he does not want human sacrifice. There's an added effect here since Isaac is the ancestor of the Hebrews. Whenever that story is told to that group of people, they would on some level realize, that if Abraham had sacrificed Isaac, none of us would be here.

We must take care to not insert our way of thinking into bronze age minds, and reversely, be critical of importing ideas from them.