Uh... most models make nothing. Most professors and educated people make far more.
Why? Because beauty is common. To the point of disposability. High paid models are paid not because they are pretty, but because they are skilled at modeling (yes, it's a skill). They are closer to actors - able to evoke an emotion or set of concepts through bodylanguage and expression.
In addition, top models are often less hot than you would expect because those subtle imperfections make them memorable and relatable.
So... this is completely wrong. I've never met a highly successful and highly paid model who wasn't ALSO quite smart. I've met plenty of destitute dumb ones.
I work with models. Do you?