It's about power imbalance and inpersonality. Killing people when neither they nor their friends can retaliate is easier. Being able to say do X or I kill you,

It's about power imbalance and inpersonality. Killing people when neither they nor their friends can retaliate is easier. Being able to say do X or I kill you, without the other party having a defense that will even inconvenience you gives you a shitton of power. Military AI would basically be nukes without the fall-out or collateral damage.