"Maybe Zack had a different idea about what was important to discuss, since it came up very quickly and was almost the entirety of our discussion. If I'm supposed to be drawing different conclusions other than it being about Nibelheim and Sephiroth, then I missed it, because Modeoheim didn't come up."

Well, it did, but by then it was more an accusation than a discussion. There's no disparagement in his tone, either for himself or Zack; he knows his limitations. And Sephiroth absolutely is important to him even if it wasn't other people's priorities. "And maybe that's on me, because I chose to leave when it became obvious the discussion was going nowhere beneficial, for either of us."