Based on the photos from the Mac's treasures blog, it appears that he wears his shoes outside at least occasionally. Also, people that say drive to work and walk mainly on carpet will put more wear on shoes than those of us that pound the pavement walking to subways. Others just crease shoes instantly when they try them on due to the shape of their feet. Some people are going to put more wear on shoes than others, it is what it is. Just put trees in your shoes, brush, and condition and they will last a long time.
Maybe I'm not getting something, but I thought it was vice versa?