Most people would think this yes but it isn't really the case. The car is worth more as parts than what is inside it so the ability to take the whole car is rather useful to a thief with a beavertail.
People also think thieves don't take time to set things up but they do. Motorcycles for example with alarms, the old trick was to tie a length of fishing line to it at night and tug from a distance setting the alarm off. Owner eventually thinks the alarm is playing up so turns the alarm off and bike is stolen. Might take a few nights of sitting around but to a thief a few nights for a few grand is time well spent.
Now think of that in relation to a car that can be crated up and out of the country or stripped down in 12 hours and any lapse in security or even merely mistrust of security could net someone a fair few grand for a few nights messing around.