> Trusted boot is literally a form of DRM. A different one than remote attestation.

No, it's not. (And for that matter, neither is remote attestation)

You're conflating the technology with the use.

I believe that you have only thought about these technologies as they pertain to DRM, now I'm here to tell you there are other valid use cases.

Or maybe your definition of "DRM" is so broad that it includes me setting up my own trusted boot chain on my own hardware? I don't really think that's a productive definition.