I've lived in many houses in the US (eight, some new, some older, in five states) and only one had a deadbolt on the door from the garage to the house interior.

I've lived in many houses in the US (eight, some new, some older, in five states) and only one had a deadbolt on the door from the garage to the house interior. All have had normal locks and were exterior-door-quality. So, definitely not a universal truth.