At one point the T.M. was considered to be a sound dog that one could purchase and expect to get a mountain dog that could handle a harder terrain and guard what you trained it to. Now, it is a shell of what once was, with an added 20 pounds of fur. The eyes are so deeply set and heavily hooded that the animal would have a hard time seeing anything that isn't right in front of it. The coat is unusable for any mountain living, as the animal would freeze to death after turning into a large block of ice! 

http://nypost.com/2014/03/19/tibetan-mastiff-with-lions-blood-sells-for-1-9m/

My question is, Why?

What's the point of having Yet another unusuable "working" dog?