Impressive as the record is, suppose it's the best he can do if he knows he would never be in with a chance of winning. Suppose it's better than being a dom for a team mate.
He's being a helper for Mas. His role for this Tour is to be Mas' last man standing, guide, helper, coach, teacher. Mas has said Valverde has already given him lesson #1 in how to minimize your losses 101. For the Tour a top 10 may be the best he can do, but it's also what Mas needs as he's there to help Mas improve. La Vuelta is whole other story. One other thing, if you read comments from Mas, Mas wants Valverde there with him fighting for the top 10 as well. Before the Tour Mas said he and Valverde should have good enough form that they'll both be fighting for top 10 spots.