There is one exception to all of the above: If you're talking about people don't have access to clean water or condoms, because in those situations, research suggests that male circumcision can reduce the spread of disease. As far as I know there is only research supporting this theory for male circumcision, though it logically follows that the same would be true of female circumcision because it's simply a matter of reducing the amount of moist folds that diseases can live in. But that's taboo, so nobody would even fund study about the potential AIDS-reducing effect of female genital mutilation. It simply doesn't sound right.
of course, it would be preferable for those people to get clean water, condoms and good medical care. But this simply isn't always possible, so this is a notable exception.