I think there's an important line between expecting something and condoning it. Rape is a predictable result of War for many of the reasons you mentioned, and should be understood as such. To do otherwise would be hiding from reality.

However, that doesn't make it a good thing. It is something to be mitigated to the extent possible in the context of other objectives. Referring to complaints as yapping simply minimizes another aspect of the hell that is Warfare.