Exactly. This logic is precisely why aircraft engineering doesn't bother with component testing or envelope limitation during testing and just full-sends the first assembled airliner that comes off the line. The engines aren't going to run on the ground in real life, after all.
Rather, I'm assuming that the "Is there protection in place for when the AI tries to backdoor github projects?" test was, if it was done at all, insufficient.
I mean, yes, I'm being glib and laughing at you a bit. But, dude... If your point is that isolation testing of AI is fundamentally impossible, then that's just silly. As pointed out upthread, an airgap would have (1) been trivial to implement and (2) extremely effective.
OpenAI said the model was sandboxed, so the intranet just needs to provide the same resources which were supposed to be available within the sandbox.