I understand your arguments turbo-1, but just because one can make an argument that everyone should
buy health insurance doesn't mean
the government has the actual power to force people to.
That's why the Constitution includes the amendment process. There have been multiple times in this nation's history where the Constitution was found to be wrong or in need of some additions or in need of a change or upgrade, which is why we can amend it.
The Constitution exists to limit the powers of the Federal government. It says the Federal government can only do this, this, and that, with some broad interpretations here and there, not that the Federal government can do whatever it wants with a few minor exceptions.
Just because one sees a law or policy as reasonable doesn't mean it is constitutional. The inverse also is true: just because something was constitutional didn't mean it was reasonable (or morally right).