Over-the-top hyperbole, but there is a point.
Gronowski is a gamer and has some moxie, but his accuracy at times is surprisingly awful, and, his misses are not just occasions where the pass should have been "front shoulder and not back shoulder." He's been off by several feet at times with relatively routine passes, something you wouldn't expect from a QB with his experience and success.
It's almost as if he has forgotten the importance of using the lower body, something that QB coaches preach in order to be consistently accurate.
Perplexing.