Apple has all the necessary pieces in place - it has simply failed to take a hardline stance with apps that still want your full contact list. All apps (outside of ethical developers) want to get all your contacts since that data is valuable... Apple is the party here that is responsible for limiting their access to that data - and Apple customers are the part that is responsible for putting pressure on Apple to take that hardline stance... unfortunately the last party (outside of the technically apt as represented here) aren't particularly motivated to advocate for better privacy rules. Abstractly, sure - everyone wants better privacy, but the average user wouldn't be willing to go to any real effort to get it.
