If that’s important to you, then you ought to choose a provider who offers it (assuming it’s popular enough for someone to offer it). If it’s not important to you or if you’re opposed to birth control, you should choose a provider that doesn’t offer it — since the lack of that cost to the provider will lower your premium.
Simple, right? It’s the market making choices about what people value and are willing to pay for.
But that’s not the way it is when the coercive state is involved. The latest example came today when the Obama administration announced that starting in just under 18 months, insurance companies will be required to cover birth control. Further, the companies won’t be allowed to charge a co-pay. Even if it’s unprofitable, companies will be paying for birth control for any customer who wants it.