The precedent has been set. If a QB gets drafted high, odds are they will get thrown into the fire and will either adapt or flame out.
However, the rules changes that has drastically helped offenses thrive as well as teams incorporated college offenses into the pros, its kinda hard to put up shytty stats unless you're just don't have what it takes mentally. I figured Geno would thrive because unlike Sanchez he was a starter for multiple years. He hasn't adjusted to the speed of the game which as caused him to be late in every aspect of passing including finding open receivers in time, throwing the ball in time and he's also underestimated the speed of defenses.