The real risk here isn't AI take over but total desensitization and alienation to horrors of war. US is already extremely warlike nation and yet already extremely desensitized. American and wider western sense of war is that it happens to other people in foreign countries and only real touch towards war is when somebody they knew went to do war in one of those places and maybe got injured and died. For the rest of the world and those horrors are very real and with higher automation fo war it become even easier to politicians to do when even less bodies are coming home and act of killing is pressing a button and modern shell shock is kinda feeling bad for those people who you killed on that screen.