he literally said he wouldnt fight a man with 1 arm and shanks became a yonko after losing his arm
you zorostans cant defend mihawk for your life

you zorostans cant defend mihawk for your life
That's more believable and reasonable than thinking he don't want to fight Shanks just because he has a one arm. Especially since some believe Shanks grow stronger after he lost his arm since he became a Yonko after that incident.