He only has to sell himself to the scouts and defensive coaches. Evidently they liked what they saw in him. Fans on the other hand have their own agenda, right now unless the Cowboys select a player a fan likes that move will be questioned and scrutinized. It is understandable but in the end I think having scouts and DC feeling good about the player is what matters.
The point I was making which you apparently did not acknowledge is that regardless of what the scouts and coaches think, it is still a projection.
They believe he was misused on Oklahoma's defensive system. But they are projecting he will be a great fit in this system.
But that is the pitfall of projection based on traits, it is a guess. Feeling good about a guess is nothing more than natural optimism. Until he is in pads doing what they think he can do, it is just a guess.
It is no different than a team signing a free agent and they bust mainly because the projection from the coaches and pro personnel people was wrong. They thought they would thrive in the system and for whatever reason the player could not.
I don't know what this "fan agenda" you are talking about entails.