Humans are good at designing processes and procedures that compensate for their lack of perfection. In this case that capability was not used apparently.
Anyone can make a mistake and that's fine, but a company would be expected to have processes and enough eyes to make sure that a bunch of other people need to make the same mistake before it makes its way into prod at which point the likelihood of mistake becomes really low...
Humans are good at designing processes and procedures that compensate for their lack of perfection. In this case that capability was not used apparently.
Anyone can make a mistake and that's fine, but a company would be expected to have processes and enough eyes to make sure that a bunch of other people need to make the same mistake before it makes its way into prod at which point the likelihood of mistake becomes really low...