Good question! It didn't argue one bit, literally drove it off the lot at the service center and hit the freeway and turned AP on (it's my second Model 3, so I already have such habits).
It's entirely possible it had more miles than 5 on the odometer when I picked it up. Officially the paperwork says 15, the associate who gave me the car said it was actually less, and the odometer isn't very prominent so I never even looked. Maybe it had 50 miles and was a reject ;). I should go check TeslaFi, since I reenabled that the day I bought the car. I confess that the only way I ever know how many miles my car has is when I see it on TeslaFi.