Rogla was the real hero in that Vuelta (I'll get to the reasons 'why' shortly).
Firstly, that Visma propaganda documentary is a little light on details, namely about the time gaps (among other things). On Bejes, Vingegaard gained over a minute with his surprise attack (which Kuss & Rog didn't react to) before Rog decided to counter. If Rog hadn't moved & caused a reaction from Ayuso & Mas, Vingegaard would have taken the jersey right there & then. Then immediately after the stage, Kuss said in an interview the team's pre-stage plan was to go for the stage win with Rog (this version of events was conveniently later buried). It makes sense though since Vingegaard was given the Tourmalet a few days earlier. Vingegaard ignored that & lit the fuse.
Then on the Angliru, Rog was 1:33 behind Kuss in GC. Yet when he attacked.. he was painted as the 'bad guy' whilst Vingegaard sat on his wheel & almost painted as the good guy defending Kuss - despite the fact there's no way Rog was taking the jersey there. So why wasn't Rog granted his stage win like Vingegaard the day before without a fuss? Why did the team (& social media) react in such a hypocritical manner? Who knows.
Now even if people disagree with all of the above, the very obvious reason 'why' Rog was a literal hero in that Vuelta was... because he wanted to race & give people some entertainment. Vingegaard looked like he wanted to win 'by accident' in a sort of "oops, I didn't mean to take the jersey but whatevs I'll have it!" manner. Rog wanted to race. I think neutrals should respect that.
Eurosport commentators & social media demanded a procession into Madrid with Vingegaard & Rog babysitting Kuss all to the finish line with zero GC action. I mean... do these people even enjoy bike racing? It's a cr*p way to 'race' a third week in a GT. Imagine Adam Yates getting the yellow jersey in the Tour via a breakaway & then everyone telling Pog to babysit him to the win, it would be absurd.