So, to be fair to you, you don't think he's a "real QB" yet, because that's what the OP is asking in this thread.
There's a difference between beating the best while still being a legit QB. Plenty of Legit QB's out there in the universe who never won a Super Bowl for example.
I think you have misunderstood the question. Or otherwise you're saying "He's not a real QB yet". Which you might understand why everyone would scoff at that.