Because no matter how much snow there is, you can always somewhat see what's there, and white has a shade, plus albinos have a light pink pigmint in their ears/tails/areas that need good blood flow. Eyes are also not white. They are either pink, red, or blue.

Can someone give me a link to the orignal, I lost it, want to show the person who made this that their evil plan of doom has been overruled XD