I read or heard something on 9/11 that reminded people to pick their footwear carefully, as those who wore such impractical shoes on that day had no choice but to take them off as they negotiated hundreds of flights of stairs through debris that included broken glass. Particularly for those who don't go barefoot on a regular basis, the feet aren't up to such a challenge, and you won't make it down many stairs quickly in 4" spike heels.
The point is that feet were designed to provide you with mobility. When you encase them in coverings that force them into unnatural configurations, you are going to eventually damage them, and in the mean time, render yourself practically immobile in the event of an urgent need to move. Although we live in a pretty comfortable and safe environment for the most part, it is imperative that you leave yourself options. It sounds a bit over dramatic, I know, but you should basically dress for combat in the morning. Most days, it will never be an issue, but in the event of some horrendous event like those on the morning of 9/11, you, by wearing "fashionable" clothing/footwear, put not only yourself at risk, but those who may need to come to your aid.
This carries over to your physical abilities, and I'll address that in another post, but we really need to get back to putting ourselves into a physical state something near nature intended. OK, you don't want to, or can't go barefoot in every environment. I understand that. You can, however, find shoes that fit, are of a material that is flexible enough to allow your foot to move naturally, and have no, or at least a much lower heel. Let your feet be feet.