The US tax code is over 2.5k pages, with an additional 10k pages of regulations. And I manage to file my taxes fine every year without having read all that because most of it doesn't apply to me. Following the GDPR is easy if you aren't trying to maximize tracking with minimal concessions to the law.
Most of this comes down to "Use your brain" and if you try to get around it with an Um Actually, they have the specific page to counter it. You need a legal team when you want to ride as close as physically possible to violating the law without crossing the line.