I really don't think too many Cowboys fans are angry.
Let me change the analogy.
You go in for that same surgery. You read the Doctor's bio and about all the surgeries he has performed, all the surgical stats he has piled up, so you feel confident.
But alas, once you are about to go in, you find out that he has been dismissed from his last two places of service. He looks great washing up and putting those gloves on. He talks a great game and makes you feel completely confident. But when the lights go on in the operating room, and the pressure mounts, his hands begin to shake.
You hear about a young surgeon, has been in training under this doctor and the chief of the surgeons for 4 years. The head of the surgical department assures you that he is ready. You look at some film of some lesser operations that the young guy has performed, and even with a few mistakes, he is no more erratic than the old guy with shaky hands. At least this guy has potential.
No, it isn't guaranteed that the surgery will be a success, but I'm going with the young guy who doesn't have shaky hands.