Perhaps is the lack of a good marketing research. If the designers were to research a good sample of their target audience, they would be astonished to find out that what they offer and what most women really want is almost entirely opposite.
I for one, would like classic comfortable shoes, not too high, not too low, but very, very elegant. And since we are on the subject, I would also like to see designers present a line of elegant, affordable, and classic business attires as well as the famous little black dress, but all of this for my body frame, not for a body frame that is all bones and with a perfect height. I am petite, heavy set and just cannot find a business atttire that fits me, and that flatters my body shape. Designers' pieces are too long and too tight for me, thus an elegant suite looks too long and too wide for my body frame, or it looks as if my little sister let me borrow it.
A good marketing research would project realistic expectations from any given target audience.