Its crazy how he put his life just to save ace but he didnt did the same for oden... yes the big reason why its because of the man power and probably the wrong timing for whitebeard to go an all out war on kaido.
But what if theres more into it? what if whitebeard didnt help oden its because whitebeard knew it was his destiny, saw by toki and oden. Just like they told whitebeard his destiny, they bilieve so because they knew this is the best way for the future of the ones they will left behind..
so basically after roger became a pirate king, oden probably went to whitebeard to say his farewells and go back to wano in there he told everything to whitebeard, his destiny, what will happen on the future, the supernovas, the strawhat of luffy everything..
But what if theres more into it? what if whitebeard didnt help oden its because whitebeard knew it was his destiny, saw by toki and oden. Just like they told whitebeard his destiny, they bilieve so because they knew this is the best way for the future of the ones they will left behind..
so basically after roger became a pirate king, oden probably went to whitebeard to say his farewells and go back to wano in there he told everything to whitebeard, his destiny, what will happen on the future, the supernovas, the strawhat of luffy everything..