thats fine, u can try and prognosticate on a player, but truth is, you dont know. so many factors that play into why one person becomes successful and another doesnt.
lets look at Brady, barely drafted, not exceptionally gifted athlete, mediocre college QB. If Bledsoe doesnt get hurt, maybe Brady never gets his shot in NE, and history is changed significantly. Many, many factors go into success, a lot of times dumb luck leads to success, very little in this world is black and white.
People write off others on a daily basis, usually with little or no actual information behind their reasoning. Just because, they have a gut feeling, or the person doesnt fit their agenda, or etc, etc, etc.
Facts, they mean something, even if we're being led to believe they dont anymore.