NFL refs are terrible. Bad calls directly effect the outcome of way too many games. But it's also a near impossible job.
There are way too many rules, and way to many judgment calls refs are supposed to be looking to make.
22 players on the field, running around and banging into each other at insane speeds. And a million things refs are in charge of looking for.
They need to add sky judges that can make and correct calls in real time.