Technology pretty much exists for the sake of extending, easing, and otherwise aiding human life. War exists for the sake of none of those.
Sorry, on the first page I can't really see the original post so I don't know your original point.
But I want to take issue with, "War exists for the sake of none of those.".
You could be meaning intellectual war, rather than physical. But the result is pretty much the same.
So let's imagine we have one shop. We also have two families. Imagine that both families can co-exist using this one shop for supplies, and it lasts them until they are 80 years of age (the parents)
We know nothing of the moral values of these people. Either they both co-exist and they must ration supplies. Say, if a girl is having PMS pains, she cannot afford to take medication for it, etc etc. Well what if they "went to war"? One family could live blissfully then. In this case war can "extend, ease and aid human life".
I could be missing your point, though, so apologies if that is the case.