Well I don't like the way the question is phrased. I seeit phrased that way a lot, like the other questions meant to divide, like "can feminists wear makeup" etc. Obviously there is no card you get to carry that gets taken away if you wear heels or makeup and that isn't the point.
Third Wavers/libfems made feminism all about "choices" to wear makeup, heels, sexy clothes, participate in BDSM, and other things. This was designed to drown out any discussion over whether or not these things were good for women or indeed whether or not these were things women would choose for themselves in the absence of patriarchy/male pressure.
Some women still feel pressure to wear heels for their jobs, to "look professional". There is also strong pressure to wear them at social functions.
Obviously absent of social and capitalist pressure there is almost no reason to wear heels. They are terrible for your feet and knees, extremely painful after even an hour of wear. And if there was any dangerous situation in which you needed to run or even walk quickly you might not be able to unless you were very fit and skilled in wearing them.