Of course! These people are in a war! They get slaughtered, they slaughter, they can get woken up anytime by a crazy ally shooting everybody! They can't trust even most common items as they can be stuffed with explosives. They can't trust the locals because they might be after them.

Would you like your workplace to be like that? I mean, I hope that there is no workplace as stressful as a war.

I fear there is. Street prostitutes aren't doing very well.