No you don't.
If you read Marineford Arc, you'd know damn well this isn't true.
Marineford WB was old, sick and couldn't even use Haki properly. Yet even in that condition he still took out one of the most powerful of Admirals (Akainu) and won. The Whitebeard we saw in Marineford was heavily nerfed compared to his younger version in Oden's flashback who could actually use AdvCoC and CoO.
If you read Marineford Arc, you'd know damn well this isn't true.
Marineford WB was old, sick and couldn't even use Haki properly. Yet even in that condition he still took out one of the most powerful of Admirals (Akainu) and won. The Whitebeard we saw in Marineford was heavily nerfed compared to his younger version in Oden's flashback who could actually use AdvCoC and CoO.