Can someone explain to me what's so fundamentally bad with this proposal? My understanding is that websites can essentially confirm whether the user is likely

Can someone explain to me what's so fundamentally bad with this proposal? My understanding is that websites can essentially confirm whether the user is likely to be a human because he/she accesses the website from a certified device. Won't this mean there is less need for Captchas, logins and pay walls? The doc also mentions that this will remove the need for some use-cases of fingerprinting. I imagine from a user perspective this will be an improvement. Disclaimer: Googler, but not working on Chrome