I get this, but here's my problem:
Let's say you're able to quantify impact in terms of games won. The Tackle may be considered just pretty good compared to his peers at his position and make the team 3 games better, while the Safety could be considered much more highly among his peers at his position and make the team 2 games better. Wouldn't you rather have the Tackle? The Tackle also protects the most valuable single player on the team, while the Safety still relies heavily on the players in front of him. If you have to take the guy in the first round to get him, then he's a first round prospect. People were ripping on some of the Cowboys' picks the past few years, but look how that line turned out because they invested first-round picks and said to hell with the talking heads.
