Apart from that, that doesn't change the point. Law beat Big Mom in a team effort with Kidd and even then, didn't do so by knocking her out, but by simply pushing her fully conscious off the floating island with some nukes while muting her voice, in order for her to be unable to call for her homies, and Kaido is stronger than Big Mom. Being unable to beat Big Mom by knocking her out with the help of Kidd and being severely outperformed by Blackbeard, doesn't leave much hope for Law. Because again, Law has optimized his DF power, he unlocked all the powerups and improved his stats and Haki along with it. There is nothing left for him to suddenly jump to Kaido's level, who has an abnormal body with a top tier fruit and top tier Haki, which includes sky splitting CoC. What else is Law supposed to improve to such a degree to be on the level of Kaido?