Because the "players" brought in to "compete" with him were:
A. Worse than he is.
B. Utterly ignored.
C. Injured before he was.
D. All of the above.
Jay has shown that he is capable of winning:
A. If everything goes right
B. If nothing goes wrong, and most things go right, and
C. If some things go wrong, and most things go right.
We won't even address if everything goes wrong - not even Danny or Elway could dig their teams out of the "on any given Sunday" scenario.
But, if more things go wrong than go right, Jay has not demonstrated the consistent capacity to elevate his play enough to make a difference in the outcome of the game. It has appeared over the past four years, that someone else has elevated his game (OG, Ricky, or even Lamar Smith) which has pulled the team out of the fire, and occasionally, Jay will pull one out. But, when it is totally on the line - Win or Lose relies completely on the QB - Jay is not capable of taking the team on his shoulders and taking charge and moving out unless the tenor of the game changes completely. That alone is enough to warrant looking for another player at QB. Is Feeley that player - perhaps. Will Dave play him - unless leaned on, I doubt it. Dave is trying to "not lose" games. He never took the Nathan Bedford Forrest course in how to win - either games or battles. That almost dictates the safe course, and the use of a QB that will give him a comfort zone, but will be almost totally lacking in big play capacity. I keep hoping that the line about having a QB competition this year is valid, but I have doubts about Dave living into that. He will put the game into the hands of the D no matter how long it has been on the field, insteading of taking a chance and doing something bold, if he follows historical precedent.
Therefore, unless forced by higher authority to play the younger QB with more potential than experience, he will return to form and play the more experienced and limited QB, and we will be either 9-7 or 10-6 if we are lucky, and perhaps have a short time in the playoffs. Then next year, when the D is a year older, and a lot of players are going to have to be replaced there, we will begin this process again - more than likely with someone else at the helm.
In other words, I don't believe Jay will take this team to the Super Bowl unless he has an epiphany from the Hall of Fame. There is the possibility, though, if all of the intangibles which are coming into play this season (the O line, David Boston, the young other WR's, and a gamble that the D hasn't already lost a step, or at least a very good player) go right, that the team could take him to the Super Bowl whether he is behind center or not.