"Complete sovereignty at the individual level is nearly impossible today due to the interconnectedness of our economy and society. This is due to the specialization of tasks: individuals are more productive when we focus on doing one specific thing very well. As a result, we outsource many aspects of our lives to third party specialists who are very good at providing specific goods and services.

Even if you're a "mountain main" who lives in the middle of nowhere and is mostly independent, it's unlikely that you're living a primitive lifestyle. Most of those folks are still reliant on supply chains to occasionally provide them with raw materials and higher technology items they can't create from scratch. Their "islands" of humanity still have frail bridges to society."

This is no bar to sovereignty. Sovereignty does not mean isolation and self-sufficiency, it means I am not compelled to recognize some other human(s) as having authority to compel me.

Do you imagine USA (which imports many goods) is not sovereign, but North Korea is? The regime media has been making a lot of noise lately about USA dependence on Taiwanese technology. Does this imply they hold authority over USA? But doesn't Taiwan depend on USA also?