A process not working on occasion doesn't mean the entire verification method is garbage.
I get the desire to not have to trust a third party, but realistically, there isn't a way to function without doing so, outside of going out and living in the forest in a cabin you've built yourself, either doing without electricity, or with solar panels you've built yourself from raw materials.
Human processes aren't like computers. They're messy. They fail sometimes. They need checks and balances. Sometimes those checks and balances don't work. Sometimes the checks only work well after the fact, and the people who were harmed aren't all made whole.
Yes. But a lot of people still got cars that were not as represented. So if we follow the same pattern, somebody will go to jail, but most routers will not be running verified or safe code.
So you personally test your produce to ensure it's safe to eat, has no pesticides embedded in it that could harm you, etc.? You do that after every single trip to the grocery store or farmer's market? Every trip? You don't spot check, and assume/hope/trust that the ones you don't test are safe?
https://en.wikipedia.org/wiki/Volkswagen_emissions_scandal