Ever since the world began, ask a kid what he wants to become in the future and almost 75% would answer you, doctor. So some of them pursue this dream of theirs and they already know what are the Med School Admission requirements as early as high school so they know what they should prepare for in college so they will be able to get into medical school. They know that the competition is fierce and it gets harder every year that comes by. They ask for help and advice from medical students on how to get in. But still there are others who still do not get in and try another medical school for a chance to study medicine.
Of course, there are many medical schools but there will only be 2 or 3 that are considered the best in teaching medicine.