Add a third one:
c) despite their supposedly non-political role, the Supreme Court generally shows great deference to the legislature whenever possible. A recorded legislative sentiment against the law would make it more likely for the Court to toss the whole thing, rather than attempt to just sever the individual mandate.
Supreme court “deference to legislators “ in their rulings should defer to More Congressional votes FOR REPEAL than Last years votes FOR PASSAGE........let the SCOTUS defer away....