I know that in certain countries like Japan or South Korea: it’s normal to leave the front door unlocked since the probaility of someone breaking in is low since their crime rate isn’t high. I knew a friend of mine who resides in Korea where they even left the car unlocked with the keys inside, can you do either of those things in America?
I never lock my doors when I am home, that said, I do have home defense on lock. California.
Lock the doors if I remember to when I leave.
Never been robbed or even pick pocketed.