Obito Uchiha did not want to become the Ten-Tails Jinchuriki.
According to everything Madara Uchiha had taught him in the Limited Tsukuyomi back then-
The ideal way to achieve the Infinite Tsukuyomi was to directly control the revived Ten-Tails' power and project the immense ocular power of his Rinne Sharingan onto the moon. Through the all-pervading moonlight that penetrated everything, he would cast the ultimate version of that genjutsu over the entire shinobi world. That dream world, filled with nothing but happiness, was the true Other Shore that could never be found in this hellish shinobi world.
Moreover, only then could the light of the Infinite Tsukuyomi shine on Madara Uchiha and Obito Uchiha themselves.
Of course they wanted to escape this sea of suffering and enter that world of dreams, too.
But if he became the Ten-Tails Jinchuriki himself, would the Infinite Tsukuyomi still work on him?
Madara Uchiha had never mentioned that doubt. It was Obito Uchiha's own concern.
Thus, now that the Ten-Tails had successfully returned to life, Obito Uchiha immediately arrived atop his head and used the Six Paths Techniques Madara Uchiha had taught him. A special tube emerged from the back of his neck and connected to the head of the Ten-Tails beneath his feet.
After Kakashi Hatake's earlier attack, only Obito Uchiha's head and part of his shoulders and neck remained human flesh and blood. Everything else had been replaced with a body transplanted from a White Zetsu Clone.
The combination of Uchiha and Senju power allowed him to barely use the Six Paths Techniques even without a Rinnegan. After all, these secret techniques had been personally taught to him by Madara Uchiha, a Rinnegan awakener who had once truly mastered the power of the Six Paths.
When Obito Uchiha's chakra connected to the