See also "normal accidents" [1], which are an even bigger worst case scenario, which we already struggle with, and will only get worse.
"Normal accidents, or system accidents, are... inevitable in extremely complex systems. Given the characteristic of the system involved, multiple failures that interact with each other will occur, despite efforts to avoid them... while operator error is a very common problem, many failures relate to organizations rather than technology, and major accidents almost always have very small beginnings. Such events appear trivial to begin with before unpredictably cascading through the system to create a large event with severe consequences." [1]