If you want to live in a country where the concept of private data does not exist, and your NHS health records are sold to the highest bidder, and you can't get life insurance because of what you told your GP last year, or have to pay more for travel insurance, or have a place like OcUK sell your purchasing history to marketing companies so you get even more ads, or being bombarded with contact from weightwatchers because they've bought your order history from Justeat or the footage from next doors Ring doorbell camera is being used by the local council or police without anyones consent (this has happened in the US) then by all means have GDPR revoked.