They are two seperate entities.  Self defense is the defensive side of the training.  The art of Jiu-Jitsu is a self defense technique.  But tournaments were created to test your ground fighting skills and what has happened over the years, things have evolved.  The rules have changed.  I don’t believe in the rules they have now for the tournaments.  There are techniques taught now for sport Jiu-Jitsu that you would not want to do in a street fight.  The sport schools are not teaching self defense they are teaching how to win in the tournaments.  There are similarities but they are growing apart.