Back Up Cameras-Do They Really Help?

Here is my back up camera on my ride. Many of us have them. Mine doesn't work. lol The lines don't really help me, I'm not going to lie. I was trying to back up into a parking spot at a restaurant the other day as you can see here and I still did not land between the lines. 

Either this feature is wasted on me, or I'm just really bad at parking. I think I get too concerned with watching the green lines and lose track of what I'm doing. Does anyone else not get much help from their back up camera?