I don't think it's arrogance. Remco is somewhere here:
The seven stages of grief are a conceptual framework of emotions experienced after a loss, including shock and denial, pain and guilt, anger and bargaining, depression, the upward turn, reconstruction, and acceptance and hope.
Or better said, he hasn't fully gone through all of those phases, and he avoided looking into his shortcomings through most of the phases. Remco still thinks, that, if everything is set up right, he is Pog's equal.
After Sunday, he finally understood that isn't the case (he didn't understand so after Kigali, because he thought: "what if my saddle didn't shift? I could have gone mano-a-mano" --> not realizing Pog would probably drop him like a stone on one of the cobbled climbs)
But in understanding he is not as good as Pog, he is now facing a dilemma: change his race tactics (not racing like you're pretending you're the best and let your team work for you that way), or try harder at following Pog. It seems Remco will try to do the latter. This can be seen as either brave, or stupid. It could be brave if it works, if only once. But it's more likely that this tactics will prove to be stupid.
But even if Remco is stupid, we have to ask ourselves if we would like to have it any other way? And if we shouldn't support any rider that still has the ambition to try and combat Pog. Because most have given up... Most riders are racing for second, the moment Pog goes. Is it that what we want?