We're talking about a very clever adversary here though. If QA was was enough to catch every instance clandestine sabotage/spying there would never have been any incidents of successful covert action by foreign intelligence services.
You can inspect something all you want but there's always the risk your adversary has developed something sneaky you haven't thought of yet and aren't looking for.
You can inspect something all you want but there's always the risk your adversary has developed something sneaky you haven't thought of yet and aren't looking for.