I don't get those benefits: randomly generated password is by definition only going to be usable at the site it was generated for. I'm not sure what it means fo

I don't get those benefits: randomly generated password is by definition only going to be usable at the site it was generated for. I'm not sure what it means for a password to "encode my identity", but if it includes device-specific bits then that seems like an anti-feature. And autofill for passwords is mostly good enough as a standardized way to input passwords saved in a password manager.