After he finished speaking, Black Zetsu felt that everything he had fabricated was flawless. Giving himself the role of an "accomplice" was enough. Someone else had been the mastermind, while he was neither entirely innocent nor a major player.
At the same time, Black Zetsu had not played dumb. He had presented himself as someone particularly skilled at gathering intelligence, someone who had collected a great deal of information about the shinobi world.
That let him reveal plenty of things he believed the Konoha ninja could not possibly know. Combined with the name Ōtsutsuki, even if Minato Namikaze did not know what it meant, the Nine-Tails certainly would!
The tailed beasts did not know much beyond that, but they would certainly remember the names Hamura Otsutsuki and the Sage of Six Paths.
That way, the Nine-Tails would surely feel that he had provided enough intelligence and fill in the gaps in his story for him.
If he added a few declarations of loyalty now, then even if they still harbored doubts about him, surely the worst they would do was put him in prison or a cell, given how "cooperative" he had been?
Black Zetsu had already looked into it. Konoha really was as Minato had described. Perhaps it was for some new order in the shinobi world, or perhaps Konoha intended to unify the shinobi world and wanted to project an image of never being cruel. At least so far, most of those captured by Konoha had not been executed, even wanted S-Rank missing-nin from the Akatsuki.
He even knew that dangerous individuals like Hidan, whom Konoha considered relatively easy to control, would be reassigned to suitable jobs through reeducation through labor.
As long as he did not expose his abilities or identity and cooperated as much as they