And the rest of your answer still does nothing to address concerns over 'region locking' of bitcoin nodes - what if we just decided that today, nobody from Zimbabwe can access the blockchain?
? He clearly stated it would be optional. (And he doesn't need to, because since this isn't changing the core protocol, it has to be optional) The concern is more like "nobody from Zimbabwe can use X wallet/buy from this company/etc." The blockchain will always be open.