Let me rebuttle by saying that in nature, its a mix of both beauty and brains, because if you are beautiful with no brains, your offspring will also not be as smart which would threaten that specific population, while having brains and no beauty would mean you would never find a mate to further that species.
its cool to choose which you would prefer, but wouldnt you agree that there should be a balance? Also, please specify what kind of model and what kind of professor you are talking about, the average salary for a model in 2012 was 18k while at a professor at specific universities make over 100k in a 9 month span. Its fine to be shallow, but you better have enough brains and beauty for survival, and last i checked, being shallow is neither a beautiful or smart trait to posess
(Not trying to hate, just putting this out there as something to think about)