Yeah, but they aren't.
Google certifies devices unpatched for the last 10 years, rooted, riddled with the malware, because the keys have leaked.
Google knows and still sells the lie.
But you should know better. Google is not selling the actual security, it's just protecting its business.
Google's business is advertising. Right now they don't care whether your phone is "authentic" or secure, because it doesn't cost them money. As AI-enabled bot fraud rises, they will care. Fighting this requires identifying human beings, and that requires trusted devices to be associated with human beings. We're in the foothills still, but look forward and up at where adtech is going.