Even a good lawyer cannot defend the indefensible.
GMTA
I’m not a legal scholar, but it seems the relevant points were that ObamaCare attempts to create commerce to regulate. This would apply to people who choose to be uninsured.
The government attempted to say that they are in the insurance market whether or not they purchase insurance, and thus have a right to make them buy a policy.
There also seemed to be a lot of questions that drew the distinction of what was being regulated; health care or insurance. The government tried to basically say they are intertwined.