What I am saying is that it was never implied Luffy is capable of holding off Katakuri that long i.e., long enough to make him run out of FS because he doesn't have any abilities to dance around FS. How do you suppose Luffy makes him lose FS? By not fighting him? Of course, he has to fight, meaning he'd gonna keep taking damage. You're giving too much value to the random conversation instead of looking at how the fight b/w them actually transpired.