Vingo's ITT wasn't that good. Which is weird after his otherworldly ITT at le tour. He had a chance to win the Vuelta during the ITT. Same goes for Rog. As such, Kuss defended his position there and also multiple times afterwards.
Listen, if there was a better competitor out there to draw Rog or Vingo up the road assuming Kuss couldn't also follow, they might have won it that way too. Their only option to win in spite of all that was be an a$$ or resist being an a$$. They barely chose the latter.