>At some point, one of those people would definitely have had a CT or an MRI on their skull
The tech is adversarially designed, you're assuming the medical supply chains are not compromised, and are dramatically underestimating the sophistication involved here generally.
You can't even assume the people interpreting the results are uncompromised, are trained to interpret results in the context of adversarial technology, or are even physiologically able to accurately interpret what they are looking at. This has it's roots in military intelligence, it's not a trivial compromise.
The tech is adversarially designed, you're assuming the medical supply chains are not compromised, and are dramatically underestimating the sophistication involved here generally.
You can't even assume the people interpreting the results are uncompromised, are trained to interpret results in the context of adversarial technology, or are even physiologically able to accurately interpret what they are looking at. This has it's roots in military intelligence, it's not a trivial compromise.