It amazes me that people still think the job of all the teams is to make the main favourite lose instead of riding their own race.
You let Carapaz gain time, you then need to count on both Carapaz and Pogacar having a bad day if you want to win the race, instead of Pogacar only.
Disagree with this entirely in the specific context of this stage.
Pogacar and his remaining team mate would have
had to ride if no one else did.
They couldn't just let Carapaz ride into the distance. Pogacar is the best ITTer in the field and the overwhelming favourite for GC. There was very little / minuscule chance of Carapaz putting serious time into Pogacar once he committed to the chase himself. The consequences for the rest of the field therefore wouldn't have been Carapaz gaining significant time, but Pogacar and his sole team mate burning serious matches in committing to the chase.
Instead, Movistar ignored this obvious tactical opportunity to put the favourite of the race under pressure and did the work themselves. It makes zero tactical sense unless they are more interested in competing for minor placings rather than aiming to actually win the race.
The only way anyone, Movistar or Ineos included, is going to beat Pogacar for GC is either through misfortune for Pog or taking advantage of Pog having to chase down attacks himself due to his weaker team. It might not have made a difference to the race today, but over another 2 weeks it would. He might have let Carapaz take 20 seconds or so today but he can't do that every day.
Today is perfect evidence that this is unlikely to happen, because unambitious, poorly managed and tactically incompetent teams like Movistar would prefer to protect their chance at 4th/5th place.
Which I find embarrassing on their behalf. This is global elite sport, not a school sports day.