As a matter of practice, no one would carry a physical, metal key they use once a year. The key-card tackles this problem. It can be tucked away in a wallet.
Do you not have other keys? Or like, is it up to Amazon or whoever, along with battery electrochemistry, to let you into your house, too?
(“Physical, metal key”. That actually makes me incredulous, to be honest, as if carrying three grams is a burden. Are we just a parody of ourselves now?)
By "physical, metal key" I'm just disambiguating between key fobs, key cards, phone-keys, and tumbler keys.