So basically "war" has become an entertainment of the ruling class, because they are bored and depressed and feel the need to satisfy their primordial instincts for dominance and power? Actually that's more believable than many other theories.
And its true. War has for centuries, advanced technology, but not society. Technologies are forgotten, uninstituted, misconstrued and misused. So the whole thing ends up being pointless, furthering nothing. That just sucks.