"No one will ever know all the times we've done our job well.. but every mistake will get us f*d up the ass."
Very confusing comment, whichever is true.
On the other hand, claiming that "We didn't see it coming" is the safer and more logical public reaction for most cases. The opposite "We knew that this would happen" is a mine field.
If they knew it; there is an informer. With enough repetitions or forcing rare events to test the reactions, anybody suspicious could be disclosed as mole. And if they knew it, but didn't do anything to prevent a disaster, the public outrage wave would hit they really hard. Better to pretend to be dumb.
Like everyone thinking your spies are everywhere and know everything?
on edit: fixed typo