Almost every single example there is hyperbole. My point stands. You can if you like, lower the bar to the lowest possible common denominator as to what a word means, what its significance means. That is, of course, your prerogative. However, don't be upset when people think you're a bit of a twat for comparing a grocery stores "price war" to actual war.
Look up the word hyperbole. I could run down the list of examples, but, people with a grasp of the nuance of language, understand that the term war is widely used as hyperbole. Two conglomerates are not literally at war. The term "war" is used to exaggerate, to place emphasis on the fact they are in conflict with one another. The two hemispheres of the brain are not literally at "war". It is hyperbole, an exaggeration to place emphasis on the struggle between the two hemispheres of the brain.
War has become a weasel word, where it is thrown around so much, people have apparently forgotten the actual context of what war is, what it means, and what it entails. The war on litter, the war on this, the war on that. If we are to believe you, there is a war on anything, that anyone is against.
Hopefully, sunshine, you will never have to experience an actual war.