PS3 Netflix DVD

Why does the PS3 require a DVD from Netflix with software? Maybe in the future Netflix could allow the internet to provide the software. Getting the PS3 from the local Best Buy and getting everything setup seemed relatively easy. However, playing a Netflix movie on the PS3 proved to be very difficult. The PS3 can even setup the Netflix subscription using a special web browsing client built into the console. Unfortunately, the software engineers have devised an insanely problematic setup where Netflix requires a DVD with software to be constantly loaded into the PS3. Never mind that the PS3 had both a built in hard drive and active internet connection that could easily allowed the console to acquire and house the software and avoid the required DVD setup.