This isn't a blow to real security, just to DRM and treacherous computing. There's no legitimate security from "Secure" Boot.
How many of us have maids? How many of those maids are evil?
"Evil maid" is a generic descriptor for any number of attacks that can be performed with physical access to a device.
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. "
I genuinely hate this "cute" yet condescending name. Maids are on the low skill low wage end of the spectrum. Even if there is a motive to mount a physical attack, possibly a targeted one, it will either be performed by a person impersonating a maid or with the help of an operator giving instructions. So, either an "evil" maid who is not really evil, or an evil "maid" who is not really a maid. Contrived, inaccurate and demeaning.
This seems to sell maids a little short. I'm sure maids are just as capable of being script kiddies as anyone else.
Most people don't choose low paying physically demanding jobs when they can paste together stack overflow answers.
That said, "Evil Maid" fits here because of that - they are no someone that you expect to need technical protections from but theoretically they could be a genious adversary or just hired by one.