In the real world, stuck accelerators are a common (but very dangerous) failure mode in all vehicles (just google "stuck accelerator"), and this isn't even the first vehicle to be dinged with such a problem at the design level. Which of those principles did Toyota violate when they had an almost identical issue in 2009?
Not to say this isn't bad, or shouldn't be fixed, or that there won't be a legitimate root cause analysis produced that tells us something interesting. But what you wrote seems poorly grounded.