I think you need to rewatch the stage. I mean, Bernal attacked Roglič from afar showing great daily form, strength and confidence. Why would Roglič help a rider who is attacking him on the penultimate climb? Bernal was going full gas on that climb and was trying to drop Roglič. He didn't even look back at him until very late, close to the top of the climb and then continued pacing on the descent. In a couple of turns he missed the line so Rogla overtook him for a couple of minutes, but then again Bernal wanted to take control on the descent. Immediately when they reached the false flat/ flat Roglič started taking turns. His turns became stronger and longer as the stage progressed and in the end it was Bernal who didn't give him turns as the road started raising.
And what do you mean with "he only started pulling when he knew the group wasn't getting caught" ? Bernal got caught, wasn't he?
Also it's not true that there was noone to chase in the group behind. Bahrain was pulling hard with Caruso, Poels and later Mader. Cofidis was also pulling with Rochas and if I'm not mistaken Bora also gave some turns at the front.
This was one of the worst examples of Roglič wheelsucking. That stage was a Rogla masterpiece and one of his most epic wins.
No he didn’t have to follow Bernal but one can argue it was a smart move since then he didn’t have to worry about being double attacked by three teams. Bernal was trying to use Ineos’s numbers, move up in GC with the TT coming up, and had already said he’s going to attack because he has nothing to lose.
Roglic is the superior rider to Caruso, Poels, and Rochas. They weren’t bringing them back unless Roglic didn’t ride or blew up. But he felt and was great that day.
Bernal got caught on the climb after he cracked, that’s why he stopped helping and Roglic rode off to the finish alone. Roglic had three choices; let Bernal do all the work and they get caught, give some help and most likely get caught, or use his superior talent on this sort of terrain to help stay away and make it hard to catch them.
I never said Roglic was a wheelsucker nor did I use this as an example that he was. It was a reply to Red Rick saying Roglic never skips turns if a rider is in front and I expanded upon it.
It was an epic win and the cherry on top was Kuss getting second. The stage highlighted how superior Roglic was to the others and in my opinion, his strongest showing GT win.
I remember reading the thread of that stage and at the time everyone was writing what an idiot he is, what is he doing, why is he going with Bernal, it doesn't make sense, he should have stayed in the group, etc...
That is true, most thought it was ridiculous by Roglic till the final climb started.