All Apple policies make Apple more money. Not releasing a schematic, software to diagnose shit and forbidding selling of parts does not contribute to your device not getting stolen. All it does it make Apple more money because instead of having a thing repaired for cheap you are forced to either pay a lot of money to repair your stuff or buy a new product,
As I said I am sure the Apple car will have the tires DRMed , the excuse is to prevent stealing but the reason is to use only Apple tires, installed by Apple geniuses on your Apple car(probably will require also Apple only oils and even the water for your windscreen must be installed by a genius and be a special Apple water).
The iCloud activation lock is a theft prevention option that locks the phone to an iCloud account and will required activation after a factory reset. If you don't want to deal with Apple, don't set that option. If everyone in physical possession could override that it wouldn't be much of a lock at all...