Kekkei Genkai only give you the ability to mould the chakra necessary to create the element or make a specific ability A “Jutsu” in the same vein as, say, Izanami and Izanagi are supposed to be taught and learned, even though it’s genetically attributed only to the Uchiha. It’s not something you just master because of blood. Even Kekkei Genkai need training. Kabuto knows half the jutsu because Orochimaru literally made it his life mission to document and learn every jutsu and copy handsigns. It makes no logical sense that something previously established that can be achieved only through training and a specific exception of a Clan, is suddenly asspulled through grafting some cells on a dude who never had any formal training in drawing Natural Energy in his life, just because those same clump of cells belonged to someone who actually trained. Pein tried the draw the same thing and one of his paths became a statue. But Madara literally just needed to be Frankenstein a lung from...