The only thing Roberts did was rewrite the law to make it constitutional. He had to redefine the word "penalty" to make it a "tax" in order to do so.
Yes, his opinion put a limit on the extent to which the commerce can clause be used to legislate or regulate, but what he in essence did was rewrite a specific law to save the law, and give congress the authority to tax us for choosing to Not participate in commerce. In this case, they are taxing us for being alive.
And if congress can tax us for being alive, are we free individuals, or are we owned by the government; it's slaves.