Hackett is a perfect example of having friends in the right places. I am sure he knows football, and is probably fine a Quality Control coach, but the guy has had a rocket strapped to his back in terms of getting OC jobs way too soon. He was given the OC job here after only 1 year on NFL coaching experience and has been an OC or head coach in the NFL all but two years since then.
Between his Dad, Doug Marrone, and Aaron Rodgers he's built an entire career based solely on nepotism. Its good to know the right people, even if you're clearly bad at your job.