Given that they weren’t able to do any other work in order to make a living, just because they failed in obtaining the gratuity of money and prestige in their life, it didn’t mean it would be reasonable for them to complain about it afterwards.
There also were many adventurers, after judging their own skill calmly, decided not to participate in the military operation this time.
Furthermore, considering the scale of the dispatched troops for this military operation, the number of casualties could be called few.