You misunderstand how libertarians use the word free. To them, freedom means being able to do whatever they want whenever they want in any way they want without any form of responsibility to anyone or anything. In other words they mean anarchy, and they're deluded enough to think they're all Ayn Randian supermen who will rise to the top in such an environment. Holding a rational debate or explaining anything to someone like that is a waste of time, it's like trying to convert the pope to Buddhism.
Hey hey, don't go blaming anarchists for the libertarians and the ancaps. Theres a damn good reason why anarchists are anti-capitalist and have sworn by the motto of "Property IS theft" since Proudhon first said it in the 1800s.