Firefox and Chrome do automatic updates, and almost never has issues. That's because they stick to standards in an open and transparent manner. Why wouldn't Windows Update be able to do the same thing? Are the Microsoft software developers really that bad that they can't do what the Chrome and Firefox developers can do already?
This looks far more likely to be a political decision to avoid whatever backlash even a single failed update would produce.
Help, i've lost all 93 of my open tabs..