Accuracy has different meaning in the NFL
The difference in the accuracy needed in the NFL as compared to college is dramatic. NFL QBs must be able to thread the ball into a square no bigger than a cereal box or risk having it intercepted.
Even the definition of "open receiver" changes in the NFL. If a receiver has a step on his defender, he has beaten his man. If he has two or more steps, he's wide open. College quarterbacks rarely even attempt a throw unless the receiver has two steps on his defender.