International trade is about things, not ideas. You can't touch skin through a network. I'm working on the informationals aspects, but I know that's not complete. You don't shut your door to avoid contact through the network. You shut the door to keep out your pesky, fascist, snitch neighbors.
Privacy is about the power to reveal.
If you just want to be secret, go dig a cave. Or newcomers have to hack their way through the door. At least that makes intelligence a prerequisite to joining the club. Some folks believe that, if you want crypto, you must have something to hide. I guess that's analogous to saying, if you want doors with locks, you must have something to hide.