What does trusted app mean? A priv esc means you're now worried that any other app has a vulnerability. You might trust your default weather app to not be mal

What does trusted app mean? A priv esc means you're now worried that any other app has a vulnerability. You might trust your default weather app to not be malicious but do you trust it and hundred other standard apps to be secure? I'd rather have a secure sandbox with untrusted apps then have insecure sandbox with a ton of attack surfaces in trusted apps.