Usually "because they are cute girls" is the only motivation you get from your average mangaka...
Most likely, they prioritized moves that restricted the demon kings' attack options over dealing damage. A reasonable approach when dealing with an opponent notable for its powerful attacks.
the demon kings in the "introduction chapther" (ch.37/38) are classified as a "class" so it's probably something like:
the reason for the demons attack seems that they are starving, so if this is going for a sympathize with them or something is probably going for something like "we are literally starving so we have to eat anything to just manage to keep moving" aka they are basically going for a "locust migration" so the problem would probably settle if the kingdom send them food and teach them how to cultivate/make food, but this is unlikely since the demons seem to be classified as just monsters, and not as "intelligent races" like beastman and elves
As many as yhe author thinks he needs to balance out the bullshit power he's given everyone 😤
Around an army's worth it seems.
That's what matters to me. You tried to translate it. Sometimes it's just very hard to do it, and since this isn't an official translation, I'm not going to complain about that. You don't try to justify it with other things like "it's more authentic" or "it's more exact" to leave it in Japanese, because those arguments hold no value when you translate everything else.
That's pretty much like trying to get sympathy for some orphan after having them kill a random innocent person by saying they were starving and needed the money for food. I hope they won't do something like that, because it doesn't work at all. The moment a character kills innocent people it makes it very hard to morally justify them, if not impossible.
I'm gonna assume it will be like the Orcs. They just will have to fight humanity because the gods just decided to fuck them over to create conflict. And they just can't go against it.
