They didn't leave enough runoff at the top because they couldn't have anticipated anyone coming to a mountain finish that fast. To make that group of favourites look that ordinary was special.
I think this one was 50% his own fault and 50% just bad luck. But like you say, that's just the Vuelta, I guess. Can't wait to see what happens tomorrow. I'm gonna go ahead guess someone gets snagged by a spectator in the final sprint. Or the reindeer from Arctic North comes down from Norway to finish what it started and takes out the peloton.
I dont know how you could assign any blame to a guy who's been sprinting uphill to the finish and brain isn't working 100% at the end of a stage to expect so many people to be in his way at the finish
50% organizers, 50% idiots not moving out of the way