The average user treats their computer as an appliance and don't know the difference.
True, but how is the relevant? It is entirely possible to cater to the "appliance" crowd while still allowing people who care about such things to retain control over their computer.
Besides, that wasn't the argument that I was responding to. The argument I was responding to was that letting users have control over their computers creates business difficulties. That may be true, but is a terrible argument. Why should being able to control my own property be restricted just because it makes someone else's business a little more problematic?