In talking to a scouts at a recent showcase, I was told all these skills tests are just bench marks. Good testing can't tell you if a HS kid can hit at the D1 Level but it certainly can tell you who can't compete at the next level. A kid with 95mph Exit Velocity off the Tee may be able to hit at D1, a kid with 75 just can't. You still have to play the game but it is these skills tests that tell you which level a kid is best suited for.
There are plenty of HS players with 95 mph tee exit velos who will never play college or pro ball. They are called showcase players, and when the things are moving at game speed and the pitched ball has spin and movement, sometimes they aren’t the best players on the field. D1 baseball, and all college baseball by and large, is not just about the HR ball. It’s about being a player who can be counted on to have an effective AB when the chips are on the line, whether that is a RBI single or a sac fly. So much more goes into recruiting than metrics, and of the players recruited each year, maybe 5-7 end up playing a significant role on a team over the course of their 5 years of eligibility.