At the same time, the whole thing is full of dialogue that doesn’t sound like real conversations between people, but rather as if it were crafted to explain to the audience everything that’s happening on screen – how the world works, what the characters are feeling, and what conclusions they’re reaching. It’s as if the characters were speaking to us instead of to each other

I haven't noticed this before, but I'd bet this is stuff that's narrated in the manga but spoken out loud by characters instead in the anime. For example, in the anime the text on page 1 is narrated by Coco instead of being in silent textboxes: