Miyazaki: There are several reasons that I have employed fragmented storytelling, including in Elden Ring.
First, I want the gameplay experience to become the player's story. For that, we don't tell a rigid story in a verbose way.
Additionally, we want to leave some of the story to the player's imagination. This ties into making the gameplay experience the player's story as mentioned earlier and becoming absorbed in filling in the margins with your own imagination is simply fun, I believe.
There is also the enjoyment of collecting the fragments in order to understand. Like, "Ah, so that's what it means. It all connects."