Nothing in the synopsis has even happened with chapter 1. What kind of starting chapter is this? Did the publishers actually put in future chapter spoilers for their synopsis? (yes, they did...) The fact that there was no mention at all of a "false hero" makes the description kinda spoilery... I do not blame whoever made this title page nor the scanlator: the official Japanese synopsis is also exactly what the English synopsis says, which was just translated from that.
Tactics have nothing to do with fame, those two are plain idiots. So another class-bound universe where even the mentality of people are beholden to their classes. If a town has no "blacksmith" class person around then I presume that town is unable to make and repair its metal tools and weapons? If nobody with a "farmer" class is born in a region then farming there is dead. Guess they'll starve rather than have people do things that isn't their class.