In the mystery that lied at the heart of it, apparently. In the cages of those who were set "free" from having to think for themselves. I never saw it for myself—circumstances never made that necessary. I could see the freedom he offered would be vicious for mankind, proof of the kinds of mindsets that would get a man like my father elected. At the heart of Mementos, the need to be ... controlled was gathered together. The true wish of humanity. It was on me to grant it, and let the world be as it always was.

[Leave to Akechi to explain it this way.]

The wish granter was that god of control. But again, why you? And why are you here at all?