@Robby:
Blueno wasn't a big boss fight. He doesn't count any more than Bellamy does.
And yes, Luffy did basically all of the fighting on Lucchi but completely failed to save Robin, that was on Usopp's sniping and the rest of the crew fighting the rest of CP9. And Luffy was ready to drop dead before Usopp inspired him and distracted Lucchi for moment.
But even not counting that, after fighting Lucchi, Luffy was exhausted and completely unable to move. There were countless marines in the area and a buster call bombardment about to go off and Luffy was 100% helpless. He needed the entire crew to hold off all the captains, and Robin to haul him out, and a dues ex machina recently sentient Going Merry driving itself to save him. He won that fight without much help but lost the actual battle.
Same with Crocodile. Luffy definitely won that fight but without pure luck to save him after the second round, or Robin to save him the third, he was dead, while Croc was only knocked out. Or Enel where Luffy was the only one doing damage, but still needed Nami to get him up the beanstalk and the giant gold ball to stop the lightning storm. Or Moria where he needed 100 shadows for a starting gambit, and then the crew's help to beat Oars… and won the match with literally half a second to spare. Had Moria just pulled back even a little or waited twenty minutes till daylight he would have easily won that.
Luffy does the punchy punches and knocks the big bads out, but he does not win entirely on his own against the big guys.
Sure
Have to specify what you mean though. Are we talking about the fights themselves, or are we talking about the entire scenario surrounding them. Of course nobody claims Luffy swoops in, beats everyone, and gets out of there but that was never the point.
They fight an army and have several goals to accomplish, several people are needed.
Yep, the Marines have nothing to do with the fight itself though, nobody argued this.
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@Kaido:
Of course Inuarashi isn't going to make sense with just the plot we have right now. But things can change in the dozens or even hundreds of chapters we have before the final fight, and Inuarashi's got potential given he's gonna be one of the minks' leaders in the final war.
It's like people saying there was no room to make a cake back when we were at the wedding and the pace was at breakneck speed, only for Oda to shift the situation to make the cake baking extremely viable.
I am saying it already makes no sense with the build-up we already have now. Sure Inurashi will get developed further but he did not remotely have the spotlight, nor motivation, nor reason, to be part of 3 guys fighting against the big baddy. If anything, everything hints at Jack coming back and Inu+Neko taking their revenge with their trump card.
Just to fit that parallel, forcing Inurashi in that situation is rather lackluster and i hardly believe that will be the case.
A character doing something not even remotely build-up or even contrary to it has nothing to do with a plot point that completely fits the setting and the characters that are involved, completely unrelated comparison.