Realpolitik in action. Great powers just impose export controls because they know they can and they think it would be beneficial to the nation.
And it is nearly always hubris - the people making these decisions are surrounded by yes-men who built their whole career pumping up the egos of their superiors.
And it is nearly always hubris - the people making these decisions are surrounded by yes-men who built their whole career pumping up the egos of their superiors.