Board Thread:Versus Debates/@comment-31338621-20200309130706/@comment-32685487-20200315185057

Transplanted Hashi cells aren't as powerful as you think they are when not in a transmigrant, Yamato and Danzo are proof of that. Obito said if Itachi knew his secret, Obito would be dead, if he himself says that I am inclined to believe that more than what you think.

Also the whole blood thing doesn't matter anyway, it was just another thing to incite Sasuke to want to be the one to fight Itachi. When Itachi used the Tsukuyomi with intent to disable an enemy, he did exactly that regardless if they had the Sharingan or were an Uchiha and even against Killer B he was warned not to get caught in it. Because a not watered down Tsukuyomi works in the span of ONE second and the damage is done, it's too late. Again if Obito didn't believe Itachi could kill him he would not have said so.