That logic simply boils down to isolating yourself to a nuclear fallout bunker for your entire life, to ensure no harm ever reaches you; or the stereotypical sci-fi rogue AI logic to keep the world safe from war we must kill all humans.
I am not sure if my explanation was not apt enough or if you are just refusing to even understand, but at the end of the day - it is simply not possible to anticipate everything.
Imagine it is nightime your car has a problem, you decide to pull over and are making calls to get some help, and then out of nowhere comes a drunk driver and rams into you. Surely you could have anticipated a car would breakdown right, drunk drivers are a given too, right? Definitely not the drunk driver's fault, it is your fault that you didn't anticipate everything and decided to drive, you shouldn't be driving - absolutely your fault.
I don't really know if can explain this some better way. Hope this can make you see where your point is flawed. Have a good one.