Not quite because there is no public/private key analogy. With a physical key there isn’t much security and you are relying on the copying of the key (if someon

Not quite because there is no public/private key analogy. With a physical key there isn’t much security and you are relying on the copying of the key (if someone takes a photo) not happening. There would need to be some sophistication and anyone that sophisticated wouldn’t need to burglarise you. And it is that fact you rely on for a key. It is almost like a credit card PIN