There is a reason why Oda gave him a new goal in Wano, which was
> Knowing the significance of the D word, the fate / cursed destiny of the D by pursuing the poneglyphs and thus indirectly having to take down the yonko
> Why he is mentioned to reign Supreme in his room ability, with his devil fruit is worth 5 Billions(bigger than regular yonko bounties), called the ultimate devil fruit by some, and is linked to the national treasure of marijoa
He is not known as the surgeon of death for nothing