Use of weapons is only benign to you if you're not on the receiving end. Imagine your family being blown up by a rocket because an AI system hallucinated that they're part of a dangerous terror cell.
My point though is that this is the only use case for such systems. The common comparisons to things like knives are invalid for this reason.
When China attacks with AI weapons do you expect the free world to fight back armed with moral superiority? No. We need even more lethal AI weapons.
Mutual assured destruction has worked so far for nukes.