I have not once definitively said he will be a great, or even a good quarterback. What I've consistently said is he's shown signs of having the vision, accuracy and ability to play at a high level. Whether he does fairly consistently remains to be seen, and I've urged his naysayers to give it time to see what happens.
But you said outright he will need plenty of help from others for him to succeed. Well, I would think this applies to all QBs, but inferring what you said in context, why can't he be the guy who puts up big numbers and take over a game? You might be right, he might not be able to. But as I've also consistently said, let's just wait and see.