You know.. Using "semi-intellectual rethoric" seriously in front of basic, simple and factual statement such as "take into consideration the narrative context and characterizations" is not really a sign of understanding. Rather a primal form of anti-intellectualism. Something you really don't want to fall into mate.
I did, you complained about inconsistancies while ignoring the narrative context (
an impending execution) and the stress that creates such context on top of overestimating the players at play (
the whitebeard Pirates were weaker than the average yonko crew, demonstrated by Ace's bounty) and you are blind to the fact that most characters outside of the whitebeard Pirate didn't even try.
Whitebeard got blinded by his pride. It was a suicidal mission, Shanks knew it and try to warn him about it. They got lucky that Luffy brought reenforcement. They were already doomned.
As for high level haki, most character were too weak to use it or simply didn't have reason to. (especially the admiral for whom this was a walk in the park)