Bad policy is sometimes based not on science, but on belief:
. . . the Pentagon’s top general, Marine Gen. Peter Pace, said that homosexual acts are immoral and should not be condoned by allowing gays to serve in the military. Then . . . Rev. R. Albert Mohler Jr., president of Southern Baptist Theological Seminary, said that if homosexuality were genetic, it would still be evil and should be treated prenatally.
& It’s on geniuses like these that we base the “don’t ask / don’t tell” policy, even if there is no good evidence that homosexuals make bad soldiers, and conversely, there’s plenty of evidence that sometimes male heterosexual soldiers suck: one third of female soldiers report rape or attempted rape. So no matter what Mohler thinks, is morality really the reason we don’t let (out) gays serve? Of course not.