The correct analogy would be California’s toxic substance regulations.
They’re vaguely worded and enforcement is applied randomly based on whatever company is getting bad press at the time. So virtually everything sold in California carries a sticker saying essentially that “this product may cause birth defects.”
Even companies selling products that don’t contain any of these chemicals do so, out of fear of the asymmetric power wielded by the state.
Do a majority of train passengers jump the ticket barriers because they are afraid they might get fined billions of euros if they don’t?
The only problem with GDPR is the lack of serious enforcement against data abusers and their political adverts (“cookie banners”)