The point of having cars inspected for safety every year or every other year is that their saftey can't be the individuals responsibility only. If you drive without brakes you are dangerous to others.
The simple ocular/mechanical inspection that is used in most places catch obvious problems like rusty brake pipes or bad brake effect. They don't test software issues like whether the stability system is disabled in fifth gear over 50mph due to a buffer overflow.
So while there are similarities between me trying to fix my brakes and me trying to hack the software (Make a change to a car component, if it passes the yearly safety tests it's OK) the software is much harder, or impossible, to test by "external" black box testing that needs to be completed in say 30 minutes by a non software expert.
The simple ocular/mechanical inspection that is used in most places catch obvious problems like rusty brake pipes or bad brake effect. They don't test software issues like whether the stability system is disabled in fifth gear over 50mph due to a buffer overflow.
So while there are similarities between me trying to fix my brakes and me trying to hack the software (Make a change to a car component, if it passes the yearly safety tests it's OK) the software is much harder, or impossible, to test by "external" black box testing that needs to be completed in say 30 minutes by a non software expert.