When a size 4 is too fat

I've been reading articles all over the net about a magazine interview that Tyra Banks recently did for a magazine. In the magazine, Tyra Banks makes a statement that she would have been too heavy to model if she tried to start now in 2012. It shows a picture of a young black model flaunting a size 0 frame. The girl looks sick, like really sick. Nothing wrong with being skinny and slim, nothing wrong with being large. What really gets to me is that most women are a size 8 or larger. This subject has been discussed for years on the net, in magazines, and on talk shows. Why do these clothing companies keep flaunting size 0-4 models when most of the female population is nowhere close to that size? It only encourages young girls that being normal is not okay. This is sad. I don't encourage anyone to strive to be a SSBBW because it doesn't work for everybody, but models flaunting size 0 bodies and Tyra saying she would be too chunky at a size 4 is ridiculous. So what, a girl that is a healthy size 8 or a size 20 is going to feel inadequate because she can't squeeze into a size 0-4. I don't even think most of these fashion designers make close that small, that just think the skinnier the model, the better they look on the runway or in the magazine. Then they use Photoshop and airbrushing to adjust breast size. Shaking my head!!!!!!!