I'm not sure how intelligence and killing go together. The soldiers who are getting blown up by those suicide drones with just enough intelligence to recognize targets and chase them, are infinitely more intelligent than said drones.

I'm kind of not sure how much intelligence squares into this compared to being faster (and cheaper) than your enemy.

I would even dare to explore the corollary - the people who sell the idea to the MIC that strong AI will turn their weapons into unstoppable killing machines are in fact far overselling the amount of improvement these systems can bring.