A different year a different super domestique same old story of Ineos winning with the strongest team but not the strongest rider
Well, that's not strictly fair, Bernal was clearly the strongest rider in the first 2 weeks of the race. He's still one of the 3/4 strongest at least, and it does help him that one of the other strongest climbers in the race, Martinez, is his teammate. And while he was the strongest, he built up a big cushion on the others, who all had big bad days.
A big part of winning GTs is having the least-worst bad day. Yates had a 3' loss in the rain. Almeida had a 4' loss on stage 4. Bernal's worst day (so far, it must be said) was a <1 minute loss.