The uni wants to broaden your degree by having to do gen-ed courses from other faculties. Apart from combined degrees, all UNSW degrees including MBBS involve compulsary gen-eds.
If your priority is to finish your degree quicker, and don't mind leaving home, then I would probably say go to...
that ranking deviates quite a bit from the annual us rankings. it only has american universities in it but there seems to be some difference.
1. Harvard University (MA)
Princeton University (NJ)
3. Yale University (CT)
4. University of Pennsylvania
5. Duke University (NC)...