Not really a good analogy.
The problem here is Oda constant fetish for "dubious" writing. To the point where you can have multiple valid points of view, using elements present in the story he tells, both to prove a point and debunk other, and we are here debating over something and going nowhere.
It's actually AMAZING how, at EVERY chapter, there are people that point things to "It's Oden's Haki. you can clearly see it because X and Y", while you have another bunch of people "It's not Oden's Haki. you can clearly see it because A and B".
Despite the fact that I'm more inclined to believe in the "oden's will is actually a real boost", I don't disregard the arguments from those saying that it isn't.
I completely understand their point of view. I just find it a little lacking, compared to the boost side.
But don't get me wrong. If Oda comes clean later and states "it was zoro all along", I will still be pissed at him and will say "then why did you highlight the fucking sword so much if it wasn't that big of a deal?".
Looks like a fake plot twist. Like when we were led to believe Rey's parents were important, just so later we found out that NOPE, THEY WERE JUST SOME RANDONS! GOTCHA!!!!! SUBVERTED YOUR EXPECTATIONS LMAO.