Wow... hit a nerve did I? I also didn't know I had sole authority to hold Apple back from anything! So does everyone want an iPhone 5 for sure today? Since I can make that happen, I will make the call.
Anyway...it has nothing to do with coordination and more or less reaching that far with my thumb. Does that problem happen all the time? No. Using the phone right hand only occasionally causes a miss when using the back button in the UINavigationBar. Instead of hitting back, I select the first email message instead. Or when reaching your palm will fold and hit the lower left corner instead. While not often, it only takes a few times to become aggravating. If as an experiment I made your home button only work 95% of the time... how long would it take before irritation sets in?
When you are carrying items with you say in an airport, work, or elsewhere... it is nice to be able to fully use the phone.
Before resorting to personal attacks, perhaps remember not everyone is built the same. So making the screen larger will cause YOU to go from having no problem to all of the sudden you see where I am getting at. I for one, am glad everyone does not have your attitude. As far as the rest of your post... lets say you are wrong and we'll leave it alone. Grow up.
What's funny is that I would like the screen to be larger, but I was just addressing the fact that there ARE reasons not to.