I'm sure we do, I'll justify what I claimed, though - the colour scheme is unified across the entire system, fonts are readable, the borders are thin and the windows have a little spacing so it isn't too crowded. I've toyed with a lot of aesthetics, and I'm quite happy with this one at the moment.
Yes, it's very information heavy, but it suits the way I work, I find it visually appealing (though I can understand why people who like OSX's aesthetics would dislike it), but quite a lot of thought has gone into how it looks :)
That's my definition of beauty. I can go days without noticing it and if I take a step back and take in the whole experience, I find the beauty.
Ubuntu does it for me. Especially because I can take time to make it beautiful for me and I can have a free hand while doing it.
Granted, I use Gnome Shell for my desktop of choice, and find that much closer to my definition of "beauty", while KDE4 is busy chasing some idea of beauty that more resembles a mish-mash of Win7 style glass that spends more time distracting my eyes than allowing me to work, so take my opinion with a grain of salt.
I think OSX has come closest to the mark of "beauty" from a desktop environment, but it's such a terrible window manager compared to X11 that I can't stand using it except when I have no other good choice. Even then the only thing keeping me from insanity is a set of third party window managing tools that still only get me about 50% of the way to where I want to be.