"drop dead gorgeous" shouldn't be part of the quality factor. I can watch TinkerBell sprinkle fairy dust over any production.
They are good, as individules & as a whole. Would they be carrying on like that at any other time while doing music, they'd probably break their necks or at the very least cause such an uproar that no one else would be able to join in the spectical. To me, it's like watching the new family of Martial Arts flicks where the principles are flying through the air & bouncing from branch to limb, it just ain't real, it ain't what happens in the real world. But then "there's no business like show business".
Besides, someone's gotta be making money & taking it in from them that was born to spend it, but not with my nickle.

Barry