This has nothing to do with security and everything with control. In whose interest is it that users have no control over what “their” hardware does or doesn’t do? Those OSs are not a product of Vietnam, they belong to, and are controlled by, Apple and Google. Now all Trump has to do is tell them to make all mobile phones in country X stop working, and they will do it. Now the U.S. government can brick a whole country with the flip of a switch.
Cory Doctorow lays it all out in his speech about the Post-American Internet: https://pluralistic.net/2026/01/01/39c3/#the-new-coalition