why is the idea of war romantic? is it a propaganda thing?

i'm in my late 20's and my younger brother is shipping off soon. not even as a trigger puller, he's doing sigint. but there's something in me that thinks "fuck that'd have been cool."
i've been watching gopro footage this weekend and there is something very appealing about the concept of going and fucking shit up somewhere. i can't even figure out why i feel this way because it's probably boring and unpleasant a lot of the time. but i can't shake the feeling that part of me wants to go fuck shit up.