even with some biology students applying to medical school without really have a serious chance, it still doesn't help your argument that a biology major has the highest chance of admission... while in some case biology could be helpful (less classes to take, maybe better chance at research), it definitely does not help as much as personal interest would.
you seem very adamant about the premed=biology major. While some of your arguments do have some merit, my opinion and experience is that those interested in medicine should not pursue a biology major JUST because they want to be premed if they have no interest in biology. At my school, biology majors (MCB) have one of the lowest average GPAs in the university, because of the hundreds of premeds that saturate the classes.
Advisors, upperclassmen, SDN folks ALL say you should most certainly major in what you are interested in rather than choosing the bandwagon biology major. If you are interested in biology (and many premeds are, just because medicine is heavily related to biology), then you should pursue it. If you are interested in economics, philosophy, whatever else, it is probably better for you, from both the standpoint of personal enjoyment and admissions, to pursue that major rather be stuck in biology with everyone else and have a tanked GPA because you aren't interested in spending all your time studying esoteric biology.