In principle I agree with you, only I also think it reasonable to figure the car didn't likely have numerous failures at the same time. Even if the throttle stuck, there are so many other computer controls that will kick in (unless turned off or reprogrammed), that still wouldn't lead to an accident. So if it had been a Toyota or other ordinary car? Possible. But that is all but impossible in a Porsche GT. The computers more drive the car than the driver does. A "stuck throttle" would trigger front-to-rear tire sensors, the brakes and transmission to shut it down within milliseconds. I don't think mechanical failure alone could account for this, though could contribute.
The shop that worked on my CL65 was astonished at the vast array of sensors all feeding computers, and I had no clue how much the computer systems of such cars now do - including for safety. Prior to it, I had a Jaguar XKR (a supercharged version of the XKE). I got rid of it because the computers SO MUCH control over the car for safety's sake it was annoying. Until the CL65 I had no clue that cars had computers that operate the brakes and throttle - like it or not. It can be almost like your just along for the ride. And the failure safeguards even worse. If the computers sense ANYTHING is wrong, they literally shut the car down - and then MAY allow you to limp home in 2nd gear. They do not want either warranty claims on multi-six figure cars nor products liability lawsuits by people rich enough to buy them.
Supercars are SERIOUSLY programs to STOP IT AND SHUT IT DOWN! if anything goes wrong. That doesn't mean just turning off the motor. It means taking control of the throttle, brakes and suspension while shutting it down. Some actually are starting to even take over steering too.
Jeremy Clark bought a Ford F40 and immediately came to hate it, because the computer just keep turning the car off sensing something was wrong.
We also get into the question of if a person goes into a 30 posted curve at 90 in a car that can do it, but blows a tire while doing so and it wrecks, is that accident solely due to mechanical failure? I suppose that would be how someone looks at it.