User blog comment:Miskos3/Fairy Tail Chapter 505: Trump Card, Review/@comment-5303512-20161007210649/@comment-24102956-20161008072417

I think that Makarov scolded her because she failed to see the reality of a true war. That no matter whatever kind of plan she had in mind, there's no real guarantee everyone in the Guild would survive.

He thought she knew better due to her participation of the Second Trade War that earned her title Fairy Tactician but he was wrong.