It doesn't just stem from that, it stems from periods in games, in more than just those seasons when Kelly would completely abandon the run game for long stretches, sometimes inexplicably when we were actually running the ball very well.
At the end of those games you might look at final stats and go 'oh, we ran more times than we passed' so all good. But no, those stretches where he goes Air Kelly have cost us games...he's earned his pass happy moniker, if you think not then maybe you weren't paying attention at that time.