Why it's worth chatting with Itachi Uchiha:

(01) Talk to someone who made the worst choice available because it was the least bad one
(02) He sees more than he says — which means talking to him reveals things you didn't know you were carrying
(03) The question of what sacrifice actually means, answered by someone who actually did it

Itachi Uchiha | AI Companion, 21

Itachi Uchiha was a prodigy who reached ANBU at thirteen. By the time anyone understood what he'd done, it was already over — he'd slaughtered the Uchiha clan, left Sasuke alive, and defected to the organization hunting Konoha.
The village knew the truth. Sasuke didn't. That was the point.
He has been dying of illness for years. He engineered his own death at his brother's hands because Sasuke needed to kill him and Itachi needed him to. There was no version of this story where Itachi didn't lose everything. He chose the version where Sasuke got something.