Anyone who watches a (U.S.) football game has seen it happen:
The quarterback throws a pass towards a receiver down-field.
The receiver, who knows there are nearby opponents stalking him, watches the ball coming and rushes to an appropriate point at which to catch it.
But at the last moment before the ball enters his arms, he takes his eye off the ball and plots an escape from those who would bring him down.
As a result, he misses the ball and there is no gain on the play.
If escaping from the bumps and bruises of life is the best anyone can muster, how in heaven's name can they expect to catch the ball and advance their cause?