Libertarians can push the proper boundaries of freedom into new areas with a new vision, independent of the Constitution.
How so?
Libertarians have the vision of every sovereign individual living their own life as they please, as long as they let others live their lives as they please.
This libertarian vision or principle has an enabling rule: don't assault people physically or steal their property.
This stands independent of, and expands the zone of freedom beyond, the federal constitution.