Just to pick a nit, but I would not be so bold as to make that statement. The "conservative" 4 need only say 'Absence of activity is not activity' to be on pretty solid legal ground. To the contrary, the "liberal" 4 would have to do more creative reasoning to justify that inactivity = activity.
Really, if you break this down to a mathematical perspective the constitutional argument for a mandate can be expressed in the equation X = Y + Z where X is the population, Y is the portion of the population participating in an activity and Z is the portion of the population not participating in an activity.
The current administration's stance is that "commerce" applies to the term X, so that both Y and Z can be regulated as subsets of X. The opposing view is that "commerce" only applies to Y and that Z is not a subset of Y and thus not subject to regulation.
There can be a good argument for a conclusion that agrees with radical rightists, and yet they make a bad argument for the same conclusion.
Let's say you think Roe v. Wade is unconstitutional for one set of reasons - if a radical Justice rules it's unconstitutional because it 'violates the Christian faith this nation is founded on', it doesn't make his argument any less a radical subversion of the separation of Church and State, just because you have a far better argument.
What I'm saying is to keep separate the issues in the constitutionality of this issue, and the politics of the Justices who might rule for radical ideological agendas.
If a mainstream Justice and one of the four radical right-wing Justices both rule this is unconstitutional, the mainstream Justice will likely have better reasons.
It's possible to have the right vote for the wrong reasons.
In your response, you took my statement, the hypothetical that 'if the two both vote no, the mainstream will have better reasons', and you simply changed my assumptions - you put a better argument in the mouth of the right-wing justice as if they'll make it for no apparent reason assuming they will do so as if the fact a better argument exists means they'll use that one and not their radical ideology they've used for years, you switch the mainstream Justice from a no to a yes vote.
You seemed to do what I said not to, mixing up the issue - your your own arguments of what's right - with the politics of the Justices, putting your words in their mouths.
It's easy to do that - which is why I raised the issue how easy it is to mix them up.