The technology left behind by the Civilization Alliance is all-encompassing, and many of them have nothing to do with combat.
But Richard did not dismiss these technologies because they were useless in battle.
Wizards are not war maniacs; they initiate wars solely to acquire resources and materials for exploring the mysteries of this world.
Many times, what Wizards study offers no help to combat or even daily life.
Yet Wizards remain enthusiastic.
In the era before civilization wars began, a considerable number of idle wizards would study these seemingly useless things to enrich their lives.
Richard could somewhat understand that phrase he saw during his time as a Wizard Apprentice.
[Wizards are a group of zealots in pursuit of knowledge. Spells and magic power are essentially just by-products of their pursuit of knowledge.]
Of course, the application of technology can happen to change.