Tom Monaghan, the founder of Domino's is Catholic, so I can see why they would oppose that. Why not offer optional contraceptive coverage for those who don't object to it?
Why should your insurance benefits depend on the religious beliefs (or in the case of these lawsuits, the "religious" attention whoring) or your boss? If your boss is a Jehovah's Witness, do you want to be forced to have a policy that doesn't include transfusions? If your boss is a Christian Scientist, do you want to be forced to have a policy that doesn't include medical treatment at all?
More specifically, why can't people realize that you can't match up a dollar paid out in an insurance claim to a dollar that paid into it? If anything, every person who buys health insurance is paying a fraction of everyone's claims, meaning everyone pays for everyone's birth control.