> Surely someone involved would have known about that. I wonder what chain of events led to the creation of a secure enclave with such well understood flaws.

Don't you think that most engineers will just laugh the idea off, and do just enough to make their PMs happy?

Such nebulous concepts as "secure enclave" only exist in imagination of MBA types. Even the name "enclave" sounds like it was picked by a seasoned talkshop person.