The "hard work" in question is a death sentence for computing as we know it today. All implementations of zero-knowledge proofs require device integrity assurance to prevent the otherwise anonymous tokens from being passed onto another user, and Google has a vested interest in pushing solutions involving remote attestation as they would double as an effective weapon against ad blocking, YouTube downloaders, pirated games, sideloaded apps that don't pay the Play Store tax and more. Requiring remote attestation on all internet-connected devices would result in the complete overnight death of desktop Linux, contribute significantly to e-waste and pave the road for further initiatives such as mandatory client-side scanning of all files (of the kind Apple attempted to introduce not too long ago, with massive backlash); I am not sure this would be preferable to simply handing over your ID.