They literally have no other way of valuing player.
1. If he has value, we scout him in college, and that is his value, pretty much for the rest of his career.
2. If we did not scout him in college, he must have no value (see number 1 above), and therefore, is of no interest to the organization.
This sounds insane to say out loud but it is a very sound hypothesis considering the evidence and how this fucked up organization functions.
You have seen it over the years...even players who have shown to be complete shitheads in the NFL still seem to carry their draft grades in their minds. They love them those former firsts that have busted in the NFL, for example.
That is an extremely arrogant method of trust in your drafting methods and if you really examine these drafts over the last eight years or so, it is a very risky strategy.
The damn team hits big on some firsts, then swing and miss badly on bums like Charlton, Mazi Smith, Jaylon Smith, Schoonmaker and Hill. And rarely hit big on a day three pick or even in UDFA lately.
How is that a "great" drafting team?