Mismanagement and idiocy can easily cause a single event to destroy multiple turbine generator sets. Doesn’t have to be the computer controls - and remember that most of the competent people have already fled.
Russia recently had a mechanical failure in a single turbine that took out the entire station’s power output: https://en.wikipedia.org/wiki/2009_Sayano%E2%80%93Shushenskaya_power_station_accident
That’s uh, impressive!
I’m still trying to imagine watching the turbine rotor, still spinning, trying to become a helicopter!