well obviously it's not a disease, in as much as we understand the term. but it is also not a minor, uninfluential part of health concerns either.

completely aside from the fact an adult woman has the unquestionable right to determine what does with her own body, there are plenty of perfectly non-sexual (cause that's what this is really about, you don't want to be subsidizing hot, sweaty premarital sex you're not having) reasons birth control should be covered.

1. ovarian cysts

2. premenstrual cramping (in some women, this can be so severe they simply lose a day or two of their lives every month to symptoms if they don't get hormonal treatments)

3. endometriosis

4. hormone irregularlities

5. other stuff that doesn't matter because your objection is to the morality, not the science anyway and there is no reasoning with moralistic anti-choice logic anyway.