Here is part of Mayor Bud's powerpoint which explains why Nygaard should (and was) appointed:
For those who won't click and enlarge it, it says:
- Nygaard promised not to run in the following election, so she wouldn't be handed an "incumbent advantage" by a council majority.
- Thus, an environment for a "fair election" is created.
People understand the fairness angle. It can be explained in one sentence.