she has the energy, motivation and ambitions for it. She was always trying to fight kaido since she was a kid and has always acted on her dream, like ace and how he was trying to fight whitebeard but kept getting sleep diffed while Yamato kept getting drink diffed. Her goal was to kill kaido, and after that her goal was to protect wano. Law on the other hand never acted on his dream until Luffy came along, then after Doffy was defeated he just was there. Law isn’t one to keep coming back over and over to accomplish his goal, or to make his entire life about just his goal, like other conquerors users