So if it was the brakes that were faulty, then the last engineer to look at them better have a good answer lined up...
That depends entirely on the nature of the fault. Things break independent of how it was installed or serviced. Then there's things like bird strikes and (especially for landing gear components) FOD on the runway. (Indeed, that's what downed Concorde AF4590.)
I don't understand the mindset that is so quick to condemn people.