Not really, I have thought through libertarianism pretty completely, and there would be some very big differences between the system we have today (in the US) and what libertarianism would call for.

Hell I can even come up with a workable UBI using libertarian philosophy that would at the same time solve the productivity / automation gap in wages people are seemingly concerned with using georgism as a base.

The reality is people that only have a basic understanding of libertarianism, often only looking to Anarcho style libertarinaism specifically, that make the statements you have.

Other forms of Libertarianism, like Geo-Libertarianism do exist.