You know your right, they did replay some shots and still didn't show most of the ball going down the lane. It is like watching any other sport on tv I guess, who cares what the ball does the first 3/4 of the way just show the last 1/4 of home runs, touchdowns, anything in golf, basketball, or whatever sport you enjoy because the first 3/4 really doesn't matter.
It is like the camera crew has not filmed bowling before and gives some of the worst views of what is happening.