Six Paths Madara was already hard enough to deal with, let alone Kaguya Otsutsuki. One wrong move and people would definitely die.
So Hikaru was hesitating over whether he should let the Ten-Tails appear and allow Black Zetsu's plan to succeed. If he wanted to, all he had to do was stand by and watch. Even if Black Zetsu and Madara Uchiha could not obtain the Nine-Tails, they surely had other ways.
Don't forget that Madara Uchiha was also very knowledgeable about the Impure World Reincarnation. That much was clear from how easily he had broken free of its control in the original story. The Nine-Tails was following Hikaru and could not be used casually, so they could only find a substitute.
Even if the Ten-Tails produced this way was somewhat undernourished, it was still better than not being able to bring forth the Ten-Tails at all, wasn't it?
An undernourished Ten-Tails was still the Ten-Tails. Its strength would merely decline somewhat due to the absence of the Nine-Tails, and it would not have much effect on the Infinite Tsukuyomi plan. Black Zetsu believed that as long as Kaguya Otsutsuki was revived, everything could be resolved.
Madara Uchiha cared even less. What he wanted was to become the Ten-Tails' Jinchuriki as soon as possible, then deal with Hikaru.
Of course, that was assuming Madara Uchiha was revived. The current Madara Uchiha did not know that Hikaru had already awakened the Rinnegan.
Sunagakure had been attacked and suffered devastating losses. The news was sent out immediately, reaching the front lines and landing in the hands of Rasa and Grandma Chiyo.
"What?!"
Urgent intelligence had arrived from the village, and Rasa and Grandma Chiyo immediately looked it over. But once they learned the full story, neither of them could remain calm. The