Of course the federal government cannot force individuals to actually buy something they don’t want, but it is just as much an abomination that the court didn’t strike down the power of the federal government to regulate healthcare. Anyone who is ignorant enough to bastardize the Interstate Commerce Clause to assume such should really check their history:
It is very certain that [the commerce clause] grew out of the abuse of the power by the importing States in taxing the non-importing, and was intended as a negative and preventive provision against injustice among the States themselves, rather than as a power to be used for the positive purposes of the General Government.
–James Madison