GDPR requires companies to use “state-of-the-art measures” to protect personal data, which is intentionally vague because the state of the art obviously changes over time.
However, who will decide what the state of the art actually is at any given time? Politicians, lawyers, competitors, actual IT experts? The latter don’t commonly work for either EU or local authorities.
Because the laws are implemented by each EU member state that state of the art might even differ depending on whether you’re located in, say, France or Germany.