I’m not disputing anything you’re saying, just trying to explain the logic of a movie production studio. If they’re trying to make a Minecraft movie, they’re going to gear it to maximize the revenue from their audience.
If they made it a kids movie, it’s because they thought that would make them the most money. Whatever kind of movie they made, it’s for monetary reasons.
I’m not the author or an expert or anything. But I’m fairly sure the joke is about how his license expired and she just made him realize she’s a witness to murder.