Heh.

"Got to admit," Zack started, shifting on his feet. "It's awfully hard not to respect someone owning up for past mistakes - even if they didn't personally make all of them."

That, right there, would probably be one of the other reasons that he would consider ShinRa again. Zack did have a hand in some of that misery, whether intentionally or not. Regardless, Rufus was on a pretty rough road.