When you read Numbers chapters 22-24, it’s easy to just zero in on the talking donkey story. And why wouldn’t you?! It’s big, unusual, and supernatural! The rest of the text is just a lot of talking, urging, pleading, and manipulating. That kind of stuff happens all the time.
I think that is exactly the point of the story.
Isn’t it funny that we will rabidly search for dramatic and supernatural signs from God while ignoring the simple and clear “God answers” right in front of us? And this is especially true if the answer right in front of us is “NO.”