My car had 15 kilometers on it just from going from the factory to the boat to the the railyard to the dealership. But it was factory ordered, so nobody took it for a test drive.
Like others here have said, when buying a car off the lot, it probably has had a few test drives (I'm sure you did one too...) and moved around the lot. The tech will also drive it around the block for a QA test. Unless you factory order your car, 72 kms on a car off the lot is totally reasonable. Heck, I've seen sales & service guys slap a temporary dealer plate on a vehicle overnight just to drive it home and back to work "to get a quick impression". That's 20-30 clicks right there.
Don't fool yourself about dealers only having "a few" of one model on the lot. Just about every single dealer has holding lots spread around the city where the rest of the inventory is kept.
And break-in is important, and depends on the vehicle. I wasn't to exceed 4,500 rpm & 160 km/h for the first 2,000 km of my car's life, with varying rpms. It stated it right in the manual, and the salesman emphasized it too. Check with your dealer on what your car needs.