That was also one of my early queries when adopted OS X Lion a little over 2 years ago. The article referred to is a good one; it applied all the way back to OS X Leopard.
The real question is: Why hasn't this been fixed before OS X Mavericks?!
Add to that the obnoxious (and identical) spate of permissions repairs which show up every time Disk Utility is run — pretty much the same list referenced in the article. One would think that the repairs should 'take', but they don't, if in fact they are 'real'.
