There is a good explanation. Apple looks at the big picture, not just a few enthusiasts that want it wider. Take a look at the total sales compare to how many on this forum that want wider. Millions buy and a couple of handfuls that rant on this forum for a wider one. Apple knows exactly what its doing. Sales do not lie. If you want wider, go and select a number of Android phones today...
Oh, and here is the correct picture of the new iphone 5 compared to the iphone 4S. You know, the other picture on another thread that looks about the same but the iphone 5 looked wider in that picture and you commented on and hoped for. Now you see it as being the same width. Some times a pictured is altered a bit.
Stop talking about you know what you're talking about, because you don't. You can't compare total sales to the amount of people on a single forum wanting a wider phone.
Take a look at this thread and the poll results. 153 to 25. That's quite significant.
If people wanted just taller - That poll would undoubtedly be the other way around. You don't know what people want so stop acting like you do.