Apart from the fact that I never contended that the Supremes legislate on this case, I think the point is irrelevant.
Separation between Church and State means that you get to hold whatever "religious" belief you want in private, only that you don't get to impose those religious views (or values) on others. Not even people who just happen to be in a position of financial dependence to you.
What people call "freedom" here is the freedom to impose your arbitrary views (here "religion") onto others (employees) by cavilling over what they consider "appropriate" medical care.
What this ruling does is empower employers to meddle in what medical care their employers can spend their medical benefits, and that's wrong.
The separation between church and state held the provision that e.g. employers couldn't use their power to meddle in the (privileged) docter-patient relationship, and that protection has just been lifted.
The question of whether Hobby-Lobby employees can make do in other ways is irrelevant. I think they shouldn't have to have to circumnavigate this particular obstacle in the first place.
I get the distinct impression that people fail to see how dangerous it is to lift this protection because it's touted as "Christian". For better or worse, Hindu, Muslim, Satanist, and Scientologist "religions" just got the same rights.
Your analogy about the "Hindu refusing to buy me [...]" is beside the point I think, because that's a case of an employer refusing you discretionary spending. Medical treatment is not discretionary, and although the employer ultimately foots the bill it's not something he would ordinarily have any say in (apart from this "religious" thing now). It's medical benefits, not some gift!
What I'm calling for is a state in which nobody can construe their their religious "rights" in ways that allow them to impose their religious views on others.