Even without wars, I could see knights still being needed against the monsters. Knights are basically mounted guardsman for nobility or the church. This chapter demonstrated that they're pretty essential for providing quick backup for any areas that get an uptick in monster population.
This guy… why is he not stepping up here? When it comes to preparing for the battle he’s going above and beyond what we’d expect, but he’s really disappointing when it comes to what he’s supposed to be fighting to protect.