As someone who has worked at a public accounting firm, I can assure you that the auditors don't simply "check the math" on the numbers. Just because they don't test internal controls and express an audit opinion on those controls, does not mean they don't verify the numbers. They still perform substantive testing to reasonably assure revenues aren't overstated and liabilities/expenses aren't understated. They even say as such in the section that you conveniently left unbolded.
Don't miss the big run by always trying to chase the next big run