not that it matters but I think you are not correct about NFL reffing. They are willing to review the calls with video often. The NFL problem imo is that they have made the rules so technical that it has kind of lost the spirit of the game. Specifically, things like the way they define what is a catch and what is a fumble vs an incomplete pass. Not to say that they dont get it wrong but NBA refs have basically full subjectivity because almost any play can be called for any contact. but again just my opinion.