Ox, just because some do, does not make it desirable. The game is becoming much more professional and technical. Its not just appreciating skills, techniques, tactics etc its also about the psychology of managing young people. All this adds up to attending coaching schools, gaining experience at lower levels and building up a track record of some excellence.
So far all I've heard is that Presti a) was a good player B) was at a good club and c) is a cracker of a person, which is all fine, but nothing about what he would bring to the table as a coach. There are many assistant type coaching roles at an AFL club and Back/Mid/Fwd would be 3 of the major assistant coach roles and I would want the MFC to get a good seasoned experienced Backline coach, not an unknown rookie. If we were not building for a flag and trying to save a few dollars it might be different.