I disagree. The default for a password manager should be the most secure, with additional features and behavior only being enabled after the user has had at least the chance to make an informed decision.
It could ship with good defaults and at some point, during setup, some introduction or when relevant conditions are met, ask the user if they want to enable that feature/behavior while giving more information about what it does and potential weaknesses. It doesn't have to be disabled forever or hidden behind some obscure feature flag.
Why not?