The metrics that was mentioned & I used were only launch angle & exit velo. Of course, Arraez isn't the worst or luckiest hitter, he's the best but using only launch angle, he's lower than most & exit velo he's the lowest, he'd rank as the worst & luckiest, which again is an absolute lie. I used Arraez only to show how absurd using only launch angle & exit velo to rate hitters.
In this thread xWOBA, WOBA, xBA, BA & SO rate were not used so I didn't bring them into the reference,