Because the history of the league is filled with young QB's that looked this way in their first year, yet went on to be good QB's in this league.
Because if we use your logic, then you cut or trade every rookie that has a poor rookie year, and move on to the next, for the next year.
It is simple logic. The problem with this debate for the most part, is you and others are debating the intelligence and reputation of the people you are debating with instead of the topic. You are literally wondering why people are note agreeing with your negative opinion of them personally. It is not that hard to realize why, when you just go back and read this thread.
"You are wrong because you are stupid" <-- Not to many people going to agree with that one. LOL