“That said, I don’t see much harm in the NLRB acting as though this decision will be reversed.”
One private dollar wasted in the process is enough harm for me.
Waste and friction are a necessary part of "the process," be it political, legal, or simple living. No waste? No feedback.
If the court had ruled the other way, then the money spent fighting the decision would be called "waste."
Going forward, this decision crystallizes legal arguments. Those who oppose NLRB rulings now have easy work.