It is quite likely this would have been solved by a good automated deployment process. However, it is also quite likely that at some point a human error would c

It is quite likely this would have been solved by a good automated deployment process. However, it is also quite likely that at some point a human error would creep into either the automated deployment process itself, or be 100% correctly deployed into production. At that point, if the error is as serious, Knight would still gave gone bankrupt since they had no way to mitigate these failure conditions. Being 100% free of bugs is just not a viable way to end up with safe systems.