Then why do you pretend WSM title = undisputed strongest in a 1 on 1? In a 1 on 1, Whitebeard, Roger, Xebec, Garp, they are all in the same ballpark. And with both Whitebeard's and Garp's portrayal, as
@ZenZu stated, saying Garp = Whitebeard is giving Whitebeard the benefit of the doubt and respecting his pre TS legacy.