We're pretty crap in a capitalist society to think about those things ahead of time. Firstly, the idea that AI could "runaway" was simply a concept or a thought it wasn't baked into a real product that could do that. We're now getting close or perhaps we are at that point of where you can't race at speed for investors without now considering a real kill switch.

You could say this in hindsight for many times in which disasters or engineering issues have occurred.