I would suggest society and culture along with marketing and commercialization play some role in what we currently define as "beauty." If you look back in history you will notice the numerous changes in the way which humans define beauty.
I believe as we age, our personal definitions of beauty change as we mature and change as well. I certainly don't find the same attributes nearly as attractive when I was 18 than I do now in my middle ages.
You are correct in saying beauty sells in the world of money. I choose love, trust and loyalty over both brains and beauty in my relationships.
Ron Jeremy used to bring in around $150 million within a year, explain that one ... wait nevermind lol