It's a model's job to be thin and look great. That is what she gets paid to do and is her purpose in life. Average women are not models and shouldn't need to worry about what models are doing.
So to compare a professional model with an average woman is ludicrous because each one has a completely different purpose. I don't worry about how I look or my weight because I am not a model and don't care to be one.
The average person doesn't weld, yet they never get compared to a welder who does it everyday and gets paid to do it.
I am a mechanic to the core of my heart so I wouldn't compare my mechanical abilities to an average girl who does not share the same purpose in life as myself because that is crazy just as it would be to compare to a model.
just my soap box I guess.