There are a few distinctions between calling China a company and calling Apple a nation:
- A nation uphelds the law whereas a company uses proxies (lobbying) to make laws
- A nation has diplomatic rights, a company has to abide by export controls
- A nation has a treasury, has control over interest rates and can prosecute violators, it ensures a level playing field. A company has equity and can fire employees, but has to maximize profits (shareholder interest) and eliminate/beat competition.
- A nation has hard physical military and ability to go to war, a company has office security and HR
- A nation can prosecute criminals, a company can layoff people.
I don't think this analogy provides any interesting insight into Apple besides drawing loose connection between secrecy and censorship.