The cornerback position is hard to play. Some say it’s the toughest job in the game after quarterback.
It’s also hard to decipher, analyze and adjudicate. In examining stats, writers can manipulate their judgments with such things like a corner’s “target rate” versus his “completion percentage”, and “opponent receptions not achieving first downs”.
They can also rationalize their results. For instance, in making the New Orleans Saints’ Marshon Lattimore one of his top-rated corners, a writer at Pro Football Focus explains that the reason Lattimore had a disappointing sophomore season in 2018 is that he was matched up against the NFL’s elite receivers.