Tell the families of the people who died on 737 MAX disasters. "Don't worry - everything's going to be okay! The engineers learned from their mistakes - accountability works, you have nothing to be sad about!"

Tell the family of the person killed by a semi truck driver who showed up to work drunk or high: "Don't worry - the driver went to jail! Accountability prevented anything bad from happening!"

Accountability alone fails to prevent deadly mistakes millions of times a day; millions of mistakes are avoided daily through process, redundancy, independent review, and formal methods.

"Accountability prevents mistakes" is a comforting delusion. In reality, accountability is only marginally related to whether or not mistakes are made.

What are you even on about mate? Sure accountability doesn’t prevent all mistakes. Guess what, nothing prevents all mistakes. Accountability can help prevent some mistakes some of the time. It sounds like you’re suggesting getting rid of the concept of accountability because it doesn’t prevent ALL mistakes. Way to throw the baby out with the bath water.

"Accountability alone fails to prevent deadly mistakes millions of times a day"

...in his desperation to finally win an argument online our hero advanced, grimly ignoring the concept of Engineering.

"millions of mistakes are avoided daily through process, redundancy, independent review, and formal methods."

Ahh spoke too soon, Engineering has finally joined the chat. So what mechanism do you propose lead to the foundation of process, redundancy, independent review, and formal methods?