AI is closer to owning a pet.

If your dog escapes the back yard and kills a child, you dont blame the dog.

You blame the owner who created a poor containment and for giving the dog the right incentives that led to the death

Therefore, you blame the person wielding the hammer.

If you crush someone's skull with a hammer, you are responsible, not the person who made the hammer. But what if you crush someone's skull with a hammer that was sold to you as a head massager?

Sort of. With something as simple as a hammer sure, but when the hammer is equipped with a 9mm pistol then it falls under different safety standards that deem the tool inherently unsafe. A physical tool would be recalled if somebody got hurt in an unintended way.