That's ridiculous logic unless you're going to argue that a ball-running fullback was integral to their victory, or that the absence of a ball-
playing fullback was. Don't think that case has leg to stand on, frankly. And even if it did it still wouldn't take into account externalities like Game 3 being a dead rubber and so on.
Tedesco didn't produce anything that makes me think he was the better selection over Moylan. In fact for a lot of it, his play reminded me of Dugan, who is notoriously brilliant at stultifying back line movements.