Let me start by saying that I don't believe Remco can actually cook Pogi on his wheel on the flat (especially not in a race with that much climbing).Pogacar was actually faster than Evenepoel mano a mano on Sunday so not sure how you think it can be possible in his current shape. It's not a flat/rolling race where Evenepoel can be super-fresh, it still has some good climbs to fatigue guys with lower w/kg.
But a mano a mano battle where they're both solo is not a good comparison I think because they're both having to ride all out all the time. The point is that when they would be together on flat roads Remco can chill in Pogi's wheel when Pogi is relaying while Pogi still needs to ride hard(er) when Remco is relaying because of his aerodynamics. Ofcourse this effect is greater with bigger riders like Wout.