Because, you know, as a consumer I fail to see how paperwork protects me from anything. Being expert at paperwork doesn't mean you're an expert of being a fair tradesman.
Paperwork collectors mentality is precisely what we should beat off of bureaucracy.
* It costs billions effectively confining market for a few huge conglomerates.
* It passes throuh drugs that turn out to not have any observable effect or which are worse than ones already on market.
* It did allow pushing opioids for the epidemic.
It's not pretty. It might be better than nothing in this extreme case, but that's a pretty low bar.
Catching things with blind tests as a way to increase compliance while reducing the burden of documentation.
If it could be done efficiently, that would certainly be better.. I suspect that tests might be expensive to scale, and not offer sufficient precision... Antibiotics might disappear over time, for example.
IMO we should always strive to improve regulation and make it more efficient.
No amount of paperwork provides even a tiny bit of compliance. Just look at VW.