I'm not disagreeing with you but "Dept of War" is ENTIRELY a cosmetic change. It's literally just a name. There are people, mostly with desk jobs, who really want to feel like badasses and they really want the Dept of War. The real human consequences of this are unimportant to them and sadly unimportant to the rest of us also.
If you go to https://www.war.gov/ it says Department of War. The person in charge calls himself the Secretary of War. Warfighters are being sent into Iran. Presumably to engage in warfare. People are gonna die.
What's cosmetic about this?
Wasn’t it originally called the department of war also? If anything “department of defense” was doublespeak, as it was already primarily for war.
Cosmetic changes are frequently decisive in politics. "literally just a name" discounts the genuine power of names.