Sport versus Budo

I just finished a long discussion of sports judo versus Kodokan judo. I find it amazing that someone can argue that sport judo is a superior form of self defense to Kodokan judo. Sport judo trains to win in a narrowly defined arena where strikes and weapons aren't a consideration and your opponent has to hold on to you. Kodokan judo trains from a variety of combative distances, assumes that opponents may have a variety of hand held weapons, and assumes all attacks are possible. Which one sounds more like a sensible approach to combative training?