Real life has everything "animated". Nothing happens in an instant, there is force required to accelerate mass, etc.
Short, well-done animations make for better UIs.
This might be true, but the operating systems with animations you can't disable aren't short and they aren't well done.
> Short, well-done
This is the neglected key point. None of the examples were short or well-done.
You're not operating the GUI by thought alone, so your muscles already provide the animation. Adding additional animation on top of that is unnatural.