Our civilization desperately needs a method to modify modern microelectronics after manufacturing that can be used at least in a well-equipped repair shop, and it needs it yesterday. Alternatively, just make it illegal to ship any kind of initial bootloader as part of a CPU's/SoC's mask ROM in any computing device that is marketed as a general-purpose one. I.e. the first instruction that the CPU executes after reset…
> just make it illegal to ship any kind of initial bootloader funny how you think the solution to people imposing their will on you is to impose your will on others also, the solution you propose wouldn't work because signed firmware
Also, governments are supposed to act in the interest of people.