This isn't a blow to real security, just to DRM and treacherous computing. There's no legitimate security from "Secure" Boot.
replies(2):
https://en.wikipedia.org/wiki/Evil_maid_attack
"The name refers to the scenario where a maid could subvert a device left unattended in a hotel room – but the concept itself also applies to situations such as a device being intercepted while in transit, or taken away temporarily by airport or law enforcement personnel. "
And law enforcement will have a device to bypass most devices security
In case of a malfunction, you risk loosing all your data
Threat actors and law enforcement can bypass it
UEFI threats moving to the ESP: Introducing ESPecter bootkit https://www.welivesecurity.com/2021/10/05/uefi-threats-movin...