You're missing the point, new technological developments in warfare aren't about "worse or better" since one human wishing to inflict suffering or death on another needs only a sharp stick or a rock and their imagination to produce the worst forms of torture. They're about physical distance. Fighting hand to hand requires an immense level of personal commitment to causing harm. Each technological advance in warfare has lowered that barrier by increasing the distance at which you can maim and kill. It's now possible to kill without ever seeing the person you are killing. Autonomous weapons are the final stage of this development where you don't even need to make the decision to kill, you simply design some inevitably flawed conditions under which you would theoretically kill someone and the machine takes care of the rest.

I think the objective should be preventing war and that means making it more difficult to kill not less.