Exploding pagers would seem like something "government should never be so bold as to destroy confidence in industrial economy". It was praised for being brilliant by our rulers.

Government demanding backdoors is common even when it results in hackers, and foreign agents, finding and exploiting them. The forward thinking component of our government is not as important as maximum control value. The most dangerous car for this application is one that is pure drive by wire, without completely mechanical brake pedal/steering, that further overrides any signal to "wire control" for steering/power input.

Over the air updates is a possible vector for backdoor control, but the FSD feature of summoning vehicle from parking spot to front door, is an RC control feature. Just as key fobs get "cloned", security is not foolproof. The ultra discrete assassination power makes backdoors/hacking features very valuable.