I keep reading/hearing how one of the Red's biggest concern/weakness is center field defense. I wonder how important is CF defense anyways?

I haven't seen stats that are useful in comparing the impact but love to see it if anyone here could break it down. I personally see it as a negligible difference. Maybe we lose one game because Choo or Bruce can't run down a game-winning blooper. If CF defense is our biggest weakness then the NL should start worrying big time.