It's so retarded. I have 2 magic mice. One is always charging so I can swap them out
Something you use 8 hours a day should first of all be pleasant to use and reduce the risk of long term damage to your wrist (carpal tunnel syndrome or similar).
I've never found the Magic Mouse uncomfortable to use. I generally use a trackpad anyway. I value that it's portable, looks nice, and works great with OS X. To each their own.