It hurts you that you have to acknowledge them all an swordsmen doesn't it? Nowhere left to move the goalpost lol
Why would I care? Leechawk got his title after all the great swordsman died and he got to fight none of them. Him and Zoro are like guys trying to become the greatest swordsman in the 20th century when everyone has guns.
The same reason Mihawk is the strongest until Zoro surpasses him. Rhymes with khaki
Mihawk presumably trains a lot and had rivals etc, we were literally just introduced to Rocks as a top tier, with zero mentions of him training ever or fighting anyone. So why would he be able to fight Roger/Garp at the same time, who also have kings haki? It doesn´t even make sense.
Also, Haki is a dogshit power system that Oda added a decade into the manga anyway.