Its just style. Form over function. There was an article recently about big rigs that highlighted this. An owner-operator traded in his boxy, chrome-laden Peterbuilt for a more aerodynamic Volvo. He hates the look, but has to make a profit. Its a business after all.
Personally, I hated the 97-03 F-150 style, but I know what you mean. It is not a conspiracy, just Ford missing the boat, since products are planned three years in advance so they are stuck with the 2009. I understand they are working to get a smaller, lighter, F-100 on the market. Since it will be based on the existing F-150 frame, Im not sure how much weight they will be able to save, but maybe a much more aero body, if it will sell.
Jim