“Gronk could have made a move toward the ball but it still would have been short. Still not catchable.”
The ball was caught waist-high within (long) arm reach to the side of the spot Gronkowski was shoved out of. As a matter of fact, the defender who caught the ball’s last step - with his left foot- was at the same spot along the right edge of the “L” in Carolina, as Gronkowski’s had been when the interference began.
Actually a little above waist-high for Gronkowski. For the defender, it hit him in the upper part of the numbers as he leapt a bit.