USA Baseball Coach - Butch Chaffin Talking About Showcases & Times & Numbers

During the PBI Showcase USA Baseball Coach "Butch Chaffin" took the time to read a letter he received from his conversation with a Major College Coach on the West Coast about one of his high school players. I found this letter very interesting as I have also witnessed some of the points that the college coach was making in some showcases I have attended and teams I have played on. Why are these people so fixated with numbers? Let me know what you think?