One Piece isn't a zero-sum game. If (insert character of your choice) accomplishes something, that doesn't mean that all the other characters get a strike against them for not having done that exact same thing. Each character has their role in the story, and can contribute and grow in their own way. Constantly comparing everyone's feats to everyone else's defeats the purpose of having different characters, and degrades the characters' individuality.
Also, getting too deep into headcanon will detach you from reality.