Kaido and Luffy have no business in this because Luffy was extremely damaged in there. This is fresh Luffy.
You're literally braindead... In Kizaru vs. Luffy, he "reached" his limit, while in the Lucci fight, he's never shown to have reached his limit. He got out of G5 because he wasn't fighting anymore. You literally see Luffy on the seat, not down or no ground. Learn to read dumb-dumb.
Where exactly does say that? zoro piece? And what "more haki" did Luffy use against Kizaru? He attacked Kizaru twice in the first one and twice in the second, plus another time for attacking Saturn, and it was gatling, hence burning more haki.
Now you're just assuming things to support your braindead take, which is literally proven wrong with manga itself. We don't assume things without any proof, right? That's what you were talking about one comment ago.
Stop embarrassing yourself any more than this illiterate brother...