I think this is to deal with products/parts which aren't available in different regions. As some people have mentioned, getting a keyboard replaced in a different region that has different keyboards isn't possible(unless you accept the keyboard used in that country).

Similarly if your power brick dies, you can't expect an apple store to carry power bricks for all possible outlets(especially with the iPhone style bricks that don't have removable prongs).

Still sounds like you'll get supported to that countries ability to support you.