The auto repair industry has certain standards, and the computer industry... doesn't. In fact, the computer industry does everything it can to insulate itself from any kind of responsibility.
Because if they aren't and something happens the mechanic is the one who ends up rotting in a cell. Put the same penalties in place for ODMs and OEMs, mandating that machine owners absolutely always can change the locks to their own property, and mysteriously every single problem we have ever seen with secure boot is no longer some obscure inevitable unavoidable technology issue.
And why I want to control my own keys.
> from what I can tell loading in your own PK will override the built-in ones
How can one go about doing this? If you have any resources that can show how, please share them. The public key of the "platform key" is "fused" into the hardware, is it not?
Such as the keys to one's own house.