That’s not true, the garage typically has a full outdoor door with standard security (dead bolts, wired into the security system) the same as any other door as the interface door between the garage and the house. This is a code thing for a variety of reasons but primarily because the outdoor door is weatherized and provides a barrier against CO, but also for the precise reason that the garage door is not considered secure. The protocols for opening the door wirelessly are known insecure and municipalities have required outdoor doors at the interface due to the number of home invasions and burglaries through the garage.
Agreed. Our garages have always had three entries: one from the house, one via garage door, and a side door. Side door was always locked, garage door always closed (never locked though), and the door between house and garage not only almost never locked, but often flat out open because that's where we put the litter box.
It's functionally true. Thinking off the top of my head I can come up with at least a dozen examples growing up of friends w/ these doors. Not a single one was ever locked. Most of the time w/ school-age kids they would be left purposefully unlocked so the kids could let themselves in after school w/ the garage door PIN code.
I honestly can't think of a single person I know who routinely locks those doors.
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.
Not to mention... a car, as there's a car theft crisis nearly everywhere in the past 2-3 years. I consider the garage just another room in my home. I consider entering my garage akin to entering my house
