> Right now the FDA does this too
Not really. They come and check and confirm your procedures are in line with a bunch of paper standards. In no way they can guarantee the lack of contamination.
At best it can be said to imply what's likely the case in physical reality. But even assuming a very low corruption rate of 0.1%, that's still hundreds of bad record writers putting out bogus records.
Their m.o. is to keep digging: if they find something that is not quite right they start asking about who did it, who supervised it, what else that person has worked on... so on and so forth until they find something.
It's pretty terrifying to witness..