High heels are fashionable, wearing high heels makes women more attractive, allowing them to be more choosy over a larger number of higher quality males competing for their attention, this could explain the evolutionary advantages of this fashion statement.
What’s chic, what’s in and what’s out, should be predicted by evolutionary theory. Otherwise it will be judged by history as just a passing phase.
As women normally walk differently from men, high heels may help exaggerate the particularly feminine aspects of gait. What these shoes do is make women walk even more like women.