"...this is an implicit admission that I am not free to leave the dollar as you have claimed."
How can you say that?
You can trade ALL of your Dollars for gold or land if you want.
You can take all of your gold overseas if you want.
So how does that lock you in to the Dollar as you claim above?
What I am pointing out is that the Dollar is the best of most worlds; you get infinite flexibility along with the ability to store your wealth in any other vehicle (if any) of your choosing.
You can trade ALL of your Dollars for gold or land if you want. You can take all of your gold overseas if you want. So how does that lock you in to the Dollar as you claim above? Uh no. Its illegal to export gold without declaring it on US Customs Form 4790. And its illegal to transition to another currency without paying fictious capital gains regardless where you are on Earth.
So yes, you are locked into to dollars.