Beauty is in the eye of the beholder
It is a great truism, but only useful if each beholder asks of themselves. Why is it beautiful to me?
If your only answer is "Because it's so cool how the walls undulate and it's amazing how they do that" then I have made my point.
Sorry, but I have to disagree again. Beauty is a visceral reaction...a gut feeling. Just because one can't express themselves in finer terms than "because it's cool" does not invalidate their feeling that it's beautiful. Gehry obviously finds beauty in a piece of crumpled paper and can most likely describe that beauty in more educated terms, but just because a less educated 'me' can't express it in the same way does not mean I'm wrong.