Here are a few possible reasons why:
* Focus on the story: Audiobooks are all about the narration and the story itself. The "Dear Reader" blurbs are more of a meta-narrative, commenting on the story and the audience's experience of it. They might be seen as a distraction from the core story.
* Time constraints: Audiobooks often have a limited time limit, especially for children's books. Including the "Dear Reader" blurbs would add extra time to the listening experience.
* Target audience: While the "Dear Reader" blurbs are a fun part of the books, they might be aimed at a slightly older audience than the primary target of the audiobooks.
* Narrator's voice: The "Dear Reader" blurbs are written in a specific tone and style that might not be well-suited for the audiobook narrator. It's possible the producers felt it wouldn't flow well with the rest of the narration.
Ultimately, the decision to omit the "Dear Reader" blurbs was likely made to ensure a focused and engaging audiobook experience for the listeners.