Three words: Defense in depth. You don't always need every advantage you can get, and this is a pretty costly one. Still, it's simply wrong to assume that a particular precaution is always needless.
Interestingly, you hit a bit of a sweet-spot if your primary customer base is located halfway around the world. You can roll out updates when your people are most wide awake, but when you'll only break things for a few users if something goes wrong.