I think you guys need to listen more carefully to what Dennison said.
He said the QB in his offense has to make pre-snap reads to get the team into the right play. He doesn't have to make a lot of post-snap reads. The play and the matchups that are apparent at the line of scrimmage determines where the ball is going. It doesn't have anything to do with Tyrod seeing the field scanning the defense as the play evolves, etc. It's come to the line, see what the defense is, take the snap, throw the ball. It's how KC and a lot of teams play.
He said he knows Tyrod can do it. How does he know? Well, he didn't say, but he had him in Baltimore and he's worked with him for a couple of months. He's probably watched Taylor work out. He knows Tyrod CAN do it; it's just a question of whether he WILL do it. So discussion about whether this is coachable, which Dennison answered, really isn't relevant. Obviously it's teachable - take the ball and throw it to THAT guy. The QB just has to get the team into the right play.
Although at first in response to the question about whether this is a competition, he said everyone competes, late in the interview he admitted that one of their objectives will be to get Tyrod a lot of reps. Tyrod is the guy. We'll see if he can do what Dennison wants.