Yeah, I meant there is always first time in the manga lol
Whitebeard's bounty was lowered because he got sick, passive and weaker. Now look at other Yonko like Shanks, Kaido, Big Mom, Luffy and Teach
Neither of them got weakened as much as Oldsickbeard compared to their prime self
Not farfetched thinking Oldbeard's bounty was lowered.