Well then theres looking at it from the point of view of balance. Perhaps CA felt that the Muslims would need all those princes since they would probably have more of a tendency to be at war with a lot of people than the Catholic factions. I mean, think about it. If you're a Turk, what allies do you have? The egyptians will be competing with you. The Almohads, *maybe*. The Byzantines will probably see you as a threat. The Catholic factions, of course, will be eager to crusade and war against you. The point is you probably need all of the man power you can get, and you need some sort of insurance that your line will continue.

Again thats just a guess and I could probably think of other reasons as to why it is this way. When playing the Turks I know I don't mind having all of those princes, gives me more of a reason to use them as generals if I have a lot of them.