I'll just take a guess here, and correct me if I'm wrong, but I think the BS/MD program is a very prestigous program and very hard to get into, therefore making the accepted people feel even better about their acceptance. This program guarantees your acceptance into Med. school after obtaining ur Bachelor's degree, with a certain GPA probably. I would like to apply, but I don't have a perfect GPA. Even if the people in the program decide not to become a doctor, they can still leave the program at any time and will still have that credits in science or w/e courses they took to possibly become something else in the Health care industry (Dental, Pharmacy, Veterinarian).