What a load of rubbish.
WWI and WWII are taught in schools worldwide, they are burned into kids minds form an early age. Iraq and Afghanistan are piddling little conflicts in comparison, and no-one really takes huge interest in them as they don't affect us in general. We see it on the news, but it is distant and remote. Also, the events are nothing compared to the epic atrocities committed in WWI and WWII, so it also lacks impact form that angle.
Historical war movies are about as far from irrelevant as you can get, and I have seen or heard nothing that would make me think otherwise.
On top of that good action is good action and always well received by us action fans.