I know a few scouts, including the one that drafted my brother. I know a few players, current and former, including a sure future HOFer who played with my brother. I know a few former players who are currently in the coaching profession at both the minor and major league levels who played with my brother, including his minor league roommate.
We've had some interesting discussions about the validity of some of these "metrics". Many times the conversations have deteriorated into laughter. While they ARE used to an extent and have varying degrees of validity, anyone who takes the "metrics" as bible, while refusing to believe their lying eyes, are fooling themselves.
In his prime, Derek Jeter was a fine defensive shortstop, because he made himself into one with an unwavering work ethic. His range on pop-ups into both foul territory and the outfield carried a "+" rating, while his ability to charge and throw off balance with accuracy was as good as anyone in the game. A talent that even Don Zimmer marveled at. His sure hands made the routine play as automatic as it got and his overall arm strength and release were rated a positional "+". His footwork around the bag and his transition, as well as his delivery to the bag on DPs, were also considered "+" by actual baseball people. His athletic ability and arm strength allowed him to make the jump throw from the hole almost routine, despite the fact that he is considered a large shortstop and the notion the reason for the backhanded jump throw was because of a lack of range in the hole if laughable, as one only need look at his pre-pitch positioning on those particular plays. Some of his highest marks were in an area far less obvious to the casual fan and that area is defensive acumen.
Was Jeter a defensive marvel, the likes of say Omar Vizquel??? Did he have the range of the 5'9" 160# men that have played the position??? Was the 35 to 40 year old Jeter the same defensive SS he was in his youth??? Nope, but the current attempt to smear the 21 to 35 year old Jeter as some ham-handed hack wearing a skillet in lieu of a glove, with zero range and a defensive liability because the "metrics" say so, is the conversation that makes the baseball people we know, laugh.