If RAS is the best way to judge a football player's chances of success in the NFL, then the best route to get players is to draft Olympians.
The reality is that RAS is a good thing to look at, perhaps to contribute to the overall picture. But, the bottom line is still being a good football player and not a guy who tests well.
Clearly some teams gravitate towards good test takers, but the Rams (and others like the Pats...at least in the past) gravitate towards what a player actually does while playing the game.