If I suspect there are invisible people who can make money off of pictures of me taking a dump and can phase through doors, then I indeed might not close the bathroom doors. These metaphors never work because encrypting your text messages is qualitatively different from quotidian intuitions about privacy.
I live in a house with toddlers. This is absolutely true. I leave the door open so it doesn't bash into my leg when they come hammering on it.
What is "it" that would bash into your leg? The door? Are your toddlers strong enough to ram closed door with enough force for it to bash into your leg?