Because we're not going to even get an "AI kill switch"
When AI kills 1000 people in once incident, we'll start talking about what to do. And there will be investigations and trials and if anyone is still paying attention after 6 months, we'll see some of the legislature in the world reacting to it. Maybe put some small regulation in place that likely wouldn't have even prevented the original incident.
On the other hand, when AI kills 100,000 people with bombs, missiles, and sentry guns ... well if you complain you are not patriotic enough. You'll be asked "why do you love our enemies so much?"