For the sake of argument: Pretend you are an admissions officer in 1920. A lesbian Cherokee woman applies with stellar academical credentials. Your argument: Reject her, she will make patients uncomfortable, and "being a doctor is just as much about how well your patient population receives you as it is about how smart you are."
Today, you would say that the 1920 admissions officer was acting unethically. How is your argument any different? I maintain that selecting your class based on characteristics such as gender/race/sexual orientation is fundamentally un-American.
Well put, sir/ma'am. *applause*