The CEO of a $1.2B space company can't use its technology
qz.com
qz.com
I like their propulsion system, but they don't tell the exact specs. I would never invest without knowing that stuff.
Admittedly, this case is focsed only on geopolitical rivals, but it's easy to see that releasing many other restricted technology details so they can be easily reproduced by anyone would have a destabilizing influence on the world.
OP said export restrictions are bunk, no matter what. That's a silly thing to say. I assert, divulging the inner workings of, say, cruise missiles, would make it far too easy to make cruise missiles. Some things shouldn't be on github.