We pretty much never lock the house. Unless we're inside sleeping then my wife will lock the door for some reason. And then she only locks the front door. Not the back or side.
I’m paranoid and check the locks at least 2 times by jiggling the doorknobs before leaving. I also look back at the garage door as I drive away to make sure it doesn’t open again (for whatever reason) until it’s out of my sight.
Primary residence, the door is never locked. Even when travelling out of the country, it's open. In a city of 3m+ people.
Other houses in less desirable countries have automatic locks. When the door closes, it locks. Garage door and front doors on internet control to open and verify status.
I have not used a physical key or worried about door locks for almost 20 years now.