So why have a vote at all?
1. Keeping up appearances.
2. The primaries serve as taxpayer-funded straw polls, helping advise the superdelegates as to who is electable.
3. To test out the campaign skills of the candidates.
4. Let’s not forget that although the superdelegates have plenty of votes to throw any contested election either way, (40% of the votes needed to win a nomination), the elected delegates still make up the majority of the actual delegates.