I've let my dealer take my car home. But OP I understand your concern. As I know my dealer and their technicians quite well, I usually have the same technician work on my car, i'm much more comfortable with it. Therefore, I trust him (he knows not to scratch anything, park it on the street or curb the wheels and even parks it between two car park bays at the dealership to prevent any other car parking inches away when I've never asked him to
). Plus I can also track my cars whereabouts via the Connected Drive app. Dealer knows not to mess around so all good
.
If it was a unknown technician/dealer, then yes, like the OP i'd be worried.