How are most people handling their google account on their TV? I need to sign in for certain apps on my main account but do not want access to gmail, messages, and other sensitive apps. I have an account just for the TV but have no way to share Stadia for example.
Android TV doesn't have access to your Gmail, Messages or other sensitive apps but it has access to Google Photos unless you revoke the permission within the Google Assistant settings, which is turned ON by default.
Google Photos can only be used with the Google Assistant, Google will never make a native app for Android TV though there are 3rd party apps that allow to display your Google Photos.