I am not sure it's so black and white with encryption. It depends on your threat model. Keeping it secure from an angry ex-girlfriend is one thing, but keeping it secure from a three letter agency is another.
The mistake you are referring to is someone that assumes "encrypted" means three letter agency safe, which is a pretty terrible way to leverage encryption. In that case, it's exactly like hopping in a Tesla and assuming auto pilot will take you home without your supervision.
The mistake you are referring to is someone that assumes "encrypted" means three letter agency safe, which is a pretty terrible way to leverage encryption. In that case, it's exactly like hopping in a Tesla and assuming auto pilot will take you home without your supervision.