Thanks for this analysis. I agree with your general premise. But...

The United States government is now controlled by 'state capitalism', where corporations and rich oligarchs have written laws and control government regulators of their industry. They push to write laws that restrict personal freedoms, while eliminating restrictions on corporations and oligarchs. This sets up an unfair dynamic between individual freedoms and corporate freedoms. The wealth gap between rich capitalists and everyone else is just a logical outcome of this power imbalance.

So libertarianism historically may have lacked a logical basis, now may be one of many checks that are needed for state capitalism.

The other check to state capitalism in the U.S. is populism. Sanders on the left and Trump on the right. We may see a libertarian/populist uprising against state capitalism in the future.