Your argument fails. Prescription contraceptive coverage is being offered by Hobby Lobby.
If they are limiting the choices in a way that impacts a protected group, it would still fit the Title VII definition of discrimination.
Imagine if there were two medications that reduced the occurrence of some condition. Both cost about the same. One is about 92% effective, and the other is 99.8% effective. This condition only effects some protected group. Your company has decided to not provide the one that is 99.8% effective. Or even worse, your doctor has informed you that the only options your employer has limited your insurance company causes bad side effects in your system. However, in every other area of medicine and for no other group do they limit medications in such a way.
They are intentionally providing second class care to this protected group.
Hobby Lobby doesn't have to pay for any coverage at all. So Hobby Lobby clearly has quite a bit of say in coverage.
They don't have to give their employees bonuses either, that doesn't give them some magic say in how they spend them.
Your argument fails. Prescription contraceptive coverage is being offered by Hobby Lobby.
You claimed that:
The sexual discrimination angle won't work here. Male and female biology is different, so "discrimination" of some sort is inevitable. Is it discrimination against men if a company doesn't offer Viagra? You haven't (and probably cannot) established an objective standard for equivalent treatment when men and women have inequivalent needs.
The courts show quite clearly that even though male and female biology are different, ignoring legitimate medical needs just because someone is a person of a specific gender is discrimination. This is not some minor thing. Maternal mortality rates are about 24 in 100,000 births. Reducing unintended pregnancies saves lives. For women with certain conditions, a pregnancy is basically a death sentence (unless terminated).
I realize that they could get what they need out of pocket elsewhere, but the important part is they are providing a secondary level of care.
Lets do some math. Maternal complications account for about 0.89% of deaths per year. There are about 2.5 million deaths in the US every year, that means that about 22,250 women die every year due to maternal complications. About 40% of pregnancies, 40% of those deaths, were women who were not planning on getting pregnant. About 60% of those women were using some form of birth control, it failed them and as a direct result, they died.
By comparison, about 30,000 men in the US die every year from prostate cancer. If there were multiple options to prevent prostate cancer that costed around the same amount, wouldn't you think your employer should provide you and your doctor with all the options?