Which is pretty much the necessary slippery-slope argument to explain why we can't just let Catholic organizations say they won't pay for birth control. (Standard disclaimer about how slippery-slope arguments are usually bullshit but when we're talking about interpreting the First Amendment they're pretty much necessary.) You tell one religion it's okay to deny coverage for a form of medicine it doesn't like, well, you've either introduced a some-more-equal-than-others proposition among religions, a some-more-equal-than-others proposition among medicine, or you have to allow any religion to refuse coverage for anything.
(And yes we do in fact have some-more-equal-than-others situations with both religions and drugs in this country, but that's multiple whole separate conversations.)