Steve Wozniak strongly disagrees with you, it happend at least 3 times to him.
He is said to know a thing or two about computers, and he flat out stated it was a software problem. Toyota had his car for more than a week and “couldn’t find a problem”.
Google for yourself, old Steve even made the morning news shows talking about it.
From one of the sites I searched:
“But Wozniak said he was surprised several months ago when his 2010 Toyota Prius started accelerating on its own — to as much as 97 mph — when he used cruise control to increase the vehicle’s speed. He said he had to tap the brakes to stop the car from accelerating.”
I’ve had that happen at least twice with my Chrysler 300M (except I didn’t let it go to 97). Each time I did exactly what he did and tried it again and it worked fine. It was nothing more than a very minor inconvenience.