You simply don't understand the technology, that's the problem plain and simple. iPad LED/LCD panels use the Edge backlight method so that the iPad can be reduced in thickness. So a series of LED backlights are placed along the edges of the screen, and the thin light is dispersed across the screen from those points. The disadvantages to using this system is black levels are not as deep as they could be, the possibility of uneven lighting across the screen, especially towards the middle, and you could experience light leakage on the side areas where the backlights are placed. If you wanted close to zero or no light leakage, Apple could use a full array backlighting method, where several rows of LED's are placed behind the entire surface of the screen. However these full array panels are more expensive, and limit how thin the device can be. Sony and Samsung LCD panels are no different.
So it has nothing to do with dismissing an issue. It has to do with the limitations of the current LCD technology used combined with how much Apple wants to spend to bring this device to market. Now perhaps Apple should place a disclaimer on their product that all screens may exhibit some imperfections. LCD television manufacturers do it in terms of dead pixel count. Either way, you are looking for perfection where it rarely exists. You can return iPads until the cows come home, and you will most likely still be unsatisfied.
