Board Thread:Boruto Discussions/@comment-45148970-20200926202723/@comment-32685487-20200926204258

Here is the issue with the healing factor. Danzo had an implanted arm with Hashirama cells in it but the arm and his own body didn't have the healing factor. It seems only those who have either large portions of their body, are clones of Hashirama technically, or have a Hashirama face on them actually get the healing factor. Oro after taking the white zetsu's body, Madara 4th War and onwards, Obito, Yamato, and the White Zetsu have it thanks to the mentioned reasons. Sasuke does not have a Hashi face on his chest and has not exhibited the healing factor so it's safe to say that although his heart was likely healed with the Hashi cells he for some reason didn't grow a Hashi face and does not have Wood Release or the healing factor.