It is a system external to osx. XCode is a beast of an install so I can see that gripe. I think that an external system is required for macports and osx to exis

It is a system external to osx. XCode is a beast of an install so I can see that gripe. I think that an external system is required for macports and osx to exist peacefully; If they did not have the separation then the core osx might have trouble with a library upgraded to an incompatible version. This would mess up the "it just works" user experience methodology that Jobs wants to have.