The human element is "What do I want?" You have ideas about how you need things to work. Some folks don't care much at all about how things work, just that they can shove a thing out the door and get paid with minimal effort. Sometimes their boss is completely in agreement. Sometimes things fall apart because nobody cared enough to bother, and sometimes even that doesn't matter, and everybody gets paid anyhow.
Sometimes you wish things mattered more, and sometimes they do.