Fat is an old ingredient. In all italian ancient recipes is used... all italian regions , north and south. In modena is used for Gnocco, Tigella, in Romagna for piadina.... in campania for pizza.
Take a reasoning. When in the 80s were make the disciplinary of the Neapolitan Pizza .... Is possibile for you that the true Neapolitan pizzamakers have given us their original recipe so that everyone in the world could do it?
I have Neapolitans parents and I assure you that the pizza in Naples is completely different from what you eat the rest of the world. You trust even the disciplinary?
I had to spend a week in Naples to ask .... and to speak to all the pizzamakers friends to figure out how to make it better. And I understand that the Neapolitan is a pizza that we must learn to do. Then after that the important thing is to create your own pizza