So only people who never make a mistake should be testifying? That's a pretty small pool.

Congress bears some responsibility in that case; they should stop calling in the CEO for the hearing, who they know won't know the nitty-gritty technical implementation. They should request documents from the technical team involved, and subpoena a representative from it who can speak confidently on its function.

So let me get this straight: The CEO can't possibly be expected to know what goes on at their company, and we should allow them to incentivize internal directors to simply lie to the CEO so the CEO can say whatever they want in front of congress and pretend "they were honestly wrong"

The CEO’s job is high-level strategy. It’s like asking the President how to process an application for SSDI; they haven’t a fucking clue. (Nor should they!)