You're overestimating Carapaz, it seems. Did you ever saw this guy racing before this year's Giro?And how exactly Carapaz won the Giro? He attacked 30km to go on stage 14; and that succeeded and payed off.
Where is Carapaz there is fun.
Don't think Valverde (or Unzue) would have wanted to shoot himself after two podium spots for the team including 3rd Valverde position.