People on the internet are prone to hyperbole. I'm sure, with your limited understanding of the English language, that you don't know what it means. The definition:
1. obvious and intentional exaggeration. 2. an extravagant statement or figure of speech not intended to be taken literally
dWAR, UZR and the like have value. Very, very limited value as I think it's a work in progress. I don't put much stock in it, probably about the same amount that you put into pitcher wins, but it's not useless. I wouldn't quote it to prove a point.