NFL teams have hordes of experts watching tape and breaking down hundreds of potential prospects, looking into their backgrounds, social media, family, coaches, teachers, and so forth that the combine is just another money making machine for the NFL. The only reason the combine should exists is to get the athletes measurables, check their health, give them the wonderlic, and give teams the ability to conduct interviews in a controlled setting. It would be better to have them run through practice drills with shells than it would be to have a 300lb lineman run a 40 yard dash.