The article had this but that stood out to me:
“It isn’t possible for everyone to live on principle; as a practical matter, many of us must make compromises in asymmetrical relationships, without the control or consent for which we might wish.”
Even if you could just “go off on your own into space”, you will likely need to transact with other humans in order to survive. Put differently, I think while it is an “option” in principle, it isn’t in reality.