Of course the rules in the team are simple & yesterday was extremely straight-forward: wait for one of the two leaders if a snafu happens.
A/If it had happened to Rogla, Jumbo would have waited.
B/It really was sh*t bad luck.
C/It also does demonstrate how dual leadership is a double edged sword & can hinder both. Because yes, on the cobbled stage in the TdF last year if Rog has full leadership he doesn't lose those minutes, fractured back or not. The "we're stronger with two leaders" mantra has never been totally factual in cycling. Here in the Vuelta it's mostly just a courtesy from the team to accommodate their GC two stars.
D/Imagine a TTT in next years TdF... & Rog punctures... & the team waits for him. I imagine the reaction from the Vinge crowd would be quite spectacular (something like "the Tour champ shouldn't have to wait for Rog!").
Anyway this Vuelta is already in an "interesting place' in terms of GC because Jumbo now need to be aggressive, although honestly looking at the weather forecast for Barcelona today, the absolute necessity is to survive without incidents. And protect both leaders, or else the narrative will quickly sour if one of them gets screwed over as early as the first few stages.